Computer Viruses Can Be Spread in a Variety of Ways

December 4th, 2011 No comments
For a virus or similar program to have any great impact it needs to be able to spread from one machine to another. They are specifically designed to get access to parts of your computer system that allow for communication with other machines. Below is a discussion of some of the most common methods.

Boot Infectors

Every disk (hard disk, floppy, CD, DVD) contains a boot sector whether it is a bootable disk or not. When a computer is turned on, it looks for boot information. If the computer finds a disk with boot information, it reads that information and uses it to properly start the computer. If for some reason that boot information is infected with a virus, the virus is activated and possibly transferred to the computer’s hard drive (if the infection was on a CD for example).

Once the boot code on the hard drive is infected the virus will be loaded into your computer’s memory every time you start your computer. From memory the boot virus can travel to any and every disk that is put into your computer. This is how the infection spreads.

Most boot viruses could be on a system for a long time without causing problems, simply existing there to spread themselves. Often such viruses are designed to activate their bad behaviour on a specific date (Halloween for example). There are some nasty boot viruses that will destroy the boot information or force a complete format of the hard drive immediately after they get into a computer.

Program Infectors

When an infected application is run the virus activates and is loaded into memory. While the virus is in memory any new program file that you run can become infected. This means that there will be increasingly more applications on your system that are infected. Multiple infections are very common and will certainly cause system problems.

Program files may function without any problems for some time but eventually they will have problems or multiple infections brings the entire computer system down. The data the program produces may be a first sign of infection such as saving files without proper names, or with incorrect/incomplete data being saved.

Viruses of this type are often designed to seek out programs that are used to share information between users/computers such as email applications, screen savers, office document Macros, and self-extracting compressed files.

Through e-mail attachments

Many of the most dangerous viruses are primarily spread through e-mail attachments – files that can be sent along with an e-mail message. In such cases, the user of an infected computer unknowingly attaches an infected file to an email message, and then sends the email to a friend or colleague. When the email is received, the virus is launched when the file attachment is opened, thus infecting a new computer. Email messages with animations, automated greeting cards, jokes, photographs, spreadsheet and document files, all have been documented to contain virus files.

More and more frequently these days mass mailing email worms/viruses are being released. These attacks AUTOMATICALLY scan your computer’s files for any email address it can find and then uses your email application to AUTOMATICALLY send infected messages to any email address found in any file on your computer (not just email message files).

It is important to be aware of the emails that you open to make sure that they do not contain harmful viruses. Even emails from family and friends could have a virus, if that person’s computer is infected. This is where an anti-virus software would be really helpful in detecting if there is a virus in any incoming messages.

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Ohio Virus Removal How Does Computer Virus Spread

December 3rd, 2011 No comments
For a computer virus to spread through a computer system, or network, it must be activated. This means that the file that contains the virus must be opened, or executed in order for the virus to come to life. After it gets activated, these viruses look for certain programs to infect. The main and the important that you must note is that, all viruses seem to do well is duplicate themselves within the programs they find, and this is the main reason as to how they spread well.

There are a lot of effects that a virus can cause on your computer depends on how it has been programmed to spread. These / this programming can be one of two types: One is the resident and the other is the non-resident. The non-resident viruses are made up of two processes -one finds files on your computer to infect, and the other duplicates the virus.

Resident viruses are made up of only one process. The sole function is to duplicate itself throughout your computer. To perform this action, resident viruses are programmed to load into the computer’s memory and the virus itself is activated every time you turn your computer on. This process continues as long as the system is on.

The other ways that viruses spread through computer are:

Paper Clip

The most common and easy way is through an email attachment. Now a day’s email software allows a virus to spread simply by opening or reading an email.

It is not a good idea to open anything that pops into their in-box. Opening an attachment without verifying its contents is also not a good idea. Do not run a program that you save to disk from an email attachment without anti-virus protection in place. Also any Word documents, which may contain have viruses in embedded macros.

Dubious Downloads

Another popular way for a virus or spy-ware to spread is by piggybacking on other software that you download. You may be at risk most of the times because of this. Often these and other downloads come with malware, so running a good anti-spy-ware program provided by L&C Sunshine Technology would reduce your risk.

Sometimes it is better to just click NO when u come across pops up windows that says click here to install anti-virus software or something similar to this. Unless you know for sure that you need to press OK, do not venture in to such things then treat these pop-up as threats to your computer.

Sometimes It’s NOT Nice to Share

If you are on a network, make sure that you do not allow your hard drive to be shared, if done so then you are WIDE OPEN for the users on the network. If one of them gets a virus, then there is nothing to prevent it from copying itself to your computer through the network share.

Media such as floppies and CDROMs are prone to virus attacks very easily. Please be very careful while using them.

These days, computer systems are built to protect themselves against viral infection. Anti-virus software’s also helps you in lot of ways. So one has to be very careful in dealing with, computer software’s, hardware and anti-virus programs. Services Ohio Virus Removal could be of major use in these cases.

Author Bio:
My name is Karim Kayley and I am IT Systems Engineer with over 10 Year Experience; L&C Sunshine Technology Services was started with the business fundamentals that a client should be dealt with on a one on one personal level, not treated like an account number.

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Computer Viruses nature symptoms and prevention

December 2nd, 2011 No comments
Computer viruses are software programs like other applications. But they get attached with the general applications and use their setup or .exe file to get installed on the system. Microsoft provides an effective tool, Microsoft Malicious Software Removal Tool, to protect your system.

System viruses are proving to be fatal cause of crashing computer system. In this section our focus will be to know the nature, recovery and prevention of computer viruses.

These viruses are like small software programming which spreads from one computer to another, making disturbance in the operating system as well as in application software. These programs help them attach with a generally used program so that it can start along with the booting of that program. Hence, it affects the executable file or program (such as system extensions, INITs and control panels) and application programs. The viruses remain in dormant condition unless that specific executable file is run on the system. For example, a word processing program that contains a virus will place the virus in memory every time the word processing program is run.

Let’s understand the infection part. Computer viruses can come in the form of funny images, greeting cards, or audio and video files. Sometime it may come with e-mail attachment and pirated software CD or flash drive.

Understanding the symptom is a must requirement before doing recovery of virus.
Some significant symptoms like slow processing of your system, error message pops up like dll file error, auto restart of system with some periodic time, freezing of your system after getting logged in. You may get double extension on an attachment that your recently opened, such as a .vbs, .gif. or .exe or .jpg extension. Very rarely you may visualize some extra icons on the desktop and accidental removal of some programs and so on.

To solve or remove viruses from computer , install any updated Anti-Virus software on your PC and perform a system scan. You can take help from Microsoft Malicious Software Removal Tool. You can download and install this software from official website of Microsoft. This software is compatible with Windows 7, Vista, XP and Windows server 2003. At the end of the process, you will get a thorough report about any malicious software that have been detected and removed.

Also, you need to visit Microsoft update to get install latest updates. You can make use of Microsoft update if and only if you have Internet Explorer 5 or later. First, turn on Automatic updates on your system. Click on Start>Control Panel>System>Automatic Updates. This will preserve your system from Computer viruses.

John Matthews is a Technical support Executive working for iYogi, a leading IT support company of India, iYogi provides computer technical support for home and small business users globally.For pc scan software, registry cleaner software you can simply visit our site http://www.supportdock.com

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Prevention is the best cure for a Computer Virus

December 1st, 2011 No comments

You’re sick. You have a fever, chills, headache and so horrible that you can not think straight. No matter who claims to desperately need your help, you are not going to get out of bed. Your computer can suffer the very same – a virus. And, at worst may cause your computer to refuse to start.

The term “virus” in the computer world comes from exactly where you might think – the term used for diseases like the common cold. Like a biological virus, computer virus spreads by making and sending copies of itself to other computers.

A computer virus caused many problems in a computer and the infection occurs without the consent of the user. The copies of itself can be exactly like the original virus, or they might vary a bit. They usually spread over a network or the Internet.

Many people lump all malicious programs under the label “virus.” However, a virus is quite different from a worm or Trojan horse. Unlike a virus, a worm can not spread on its own, it requires some user action, such as opening or running an infected file. A Trojan horse is a file that tricks performed by the user appear to be harmless.

Viruses cause problems for computer users by harming programs, reformatting the hard disk or deleting files. Although the vast majority of viruses are made for the purpose of doing harm, there are a few that are meant to be harmless jokes that only the video, audio or text messages. , Regardless of these viruses still use the memory without permission.

The fist virus was named “Elk Cloner” and it was made to run on the Apple DOS 3.3 operating system. It was created by a high school student named Richard Skrenta in 1982. It was a joke virus that was transmitted using a floppy disk with a game.

The drive can successfully open the game 49 times, on the 50th the virus was activated. It causes the screen to go blank and then read a poem: .. “It will get on all your disks It will infiltrate your chips Yes it’s Cloner It’ll stick like glue It will modify RAM too Send in! .. The Cloner!”

Brain was the first virus for the PC. It was designed in 1986 by brothers Basit and Amjad Farooq Alvi. Their goal in creating the virus is to protect legitimate software they had written from piracy.

In the early days of viruses, the usual method of infection was through some form of media that can benefit from the computer to move the computer such as a floppy disk. However, today, it is easier for viruses to be spread over the Internet or via computer, so most are meant to do.

Due to the popularity of the Windows platform, the majority of viruses are designed to weaknesses in the Windows operating system to use. But that’s not to say there are no viruses that other operating systems. The truth is, no matter what operating system you are running, unless you take steps to prevent infections, your computer vulnerable.

There is a whole industry of antivirus software. The most common ways these anti-virus programs work are: 1) the detection of viruses using signature definitions, and 2) the detection of viruses using a heuristic algorithm that recognizes typical virus behavior.

A program that signature definitions are used depends on the user to the list of definitions up to date using updates and patches put the maker of the software. These are usually available at no cost with the purchase of the software or via a paid subscription to the software.

The algorithm method is able to detect viruses for which no signature exists.

Other ways of protecting your computer against viruses include backing up your data and operating system on media not stored on the hard disk of the computer. In this way, if your computer has become infected resulting in a loss of data or the inability to boot, you can restore your computer.

If your computer is infected, it is unwise to continue to use until the virus is removed by completely reinstalling the operating system. This is a time consuming process and often results in lost data. So, as with a virus in the human body, “an ounce of prevention is worth one pound cure.” An anti-virus protection program is essential to the health of your computer.

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A Simple Description of What a Computer Virus Is

November 30th, 2011 No comments
What is a Computer Virus?

Before understanding what a computer virus is, it is necessary to understand what a virus in when it occurs in a living form (such as a human body, an animal, or a plant).

A virus is a small organism that is only able to reproduce itself within another living cell or body. It is typically harmful to the cell or body in which it lives, and is the cause of many illnesses and diseases. The word virus comes from Latin and literally it means “poison.”
So basically it is a “poison,” able to reproduce itself within another cell or body. An example of an illness caused by a virus is the flu.

How does this relate to computers?

Well basically, a computer virus is a harmful computer program which will damage files or your computer, and which is able to duplicate and spread itself within a computer or computer network. Usually the computer virus is hidden within a program, file or document.

Criminals, or somewhat talented idiots with nothing better to do with their time, create computer viruses and spread them to other people’s
computers. The sole purpose of this activity is to create trouble and damage.

Similar to a common virus like the flu (which spreads from person to person), the computer virus has the ability to spread and “infect” other computers, files or documents.

A computer virus can spread itself through files and documents; such as word-processing documents, spreadsheets, emails, computer programs etc. It can spread itself through the Internet and hrough local computer networks, as well as through removable storage devices such as memory sticks and floppy disks.

Because it is hidden, it is hard to detect. It can be spread to other computers, unknowingly, by the computer user.

What exactly does a computer virus do? Well, it works similarly to viruses (like the flu) that makes a person sick, A computer virus will make your computer “sick”. What a virus will do to your computer depends on what it is programmed
to do. Some can be very harmful, while others are made to simply annoy.

A wide variety of names have been made up, in order to describe different types of computer viruses. Some examples are described in the following articles:

http://anti-virus-and-internet-security.blogspot.com/2007/01/what-are-macro-viruses.html

http://anti-virus-and-internet-security.blogspot.com/2007/01/what-are-email-viruses.html

http://anti-virus-and-internet-security.blogspot.com/2007/01/what-is-trojan-horse.html

What to do about Computer Viruses

For more information on how to handle computer viruses, you may see the following articles:

http://anti-virus-and-internet-security.blogspot.com/2007/05/what-to-do-about-computer-viruses.html

http://anti-virus-and-internet-security.blogspot.com/2007/01/reviews-of-antivirus-software.html

http://anti-virus-and-internet-security.blogspot.com/2007/01/what-to-look-for-when-buying-antivirus.html

I hope the above information will assist you in keeping your computer and your data safe.

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Antivirus Market Share 2009

November 30th, 2011 No comments
Antivirus System Pro contrary to the name is not just software to help protect you against computer bugs. Known as “scareware” what this does is actually create fake alerts and security warnings in order to scare the user into purchasing a full software version.

Some sites offer free videos to watch online.Clicking on the video were asked to download Active X codec is illegal This has resulted in difficulties to close the browser normally.Java taxi which offers a free scan virus free to offer it.

What is Alpha Antivirus?

Easy way to remove this Trojan attack? includes steps similar to the other participants trojan.This is the only Trojan attacks computers, but not attacking his own files.Therefore easy to identify these files and will be promptly removed.

This is where antivirus trial packages enter the computer market. When a prominent antivirus program manufacturer plans on releasing a new antivirus program into the market, the usual practice is to offer an antivirus trial for customers. This trial not only allows consumers to evaluate the program, but allows the more advanced costumers to test the program against several kinds of known and unknown viruses that plague cyberspace. In a few cases, they may even be able suggest certain changes that can improve the antivirus program.

Malware is in principle a malicious software that is designed to hide on your PC and monitor their activities.? If you want to remove, you will need to learn how to find hidden files on your computer and remove them.

An antivirus trial also enables existing antivirus packages manufacturers to lose a portion of their market. The conventional manufacturers like Norton or McAfee already control a big part of the market place. But their trials have an inherent flaw because they are only customized to cater to the demands of the broadest base of the market.
Find out more about Antivirus Market Share Sites at these sites:

market share antivirus
Antivirus Market Share 2009

? Following these simple steps, you can easily find hidden files on your computer and remove them.Security Instrument is one of the most popular and dangerous viruses net.It is spread on the Internet in an incredible pace, leaving the waves that devastated the computer.

Before attempting to remove antivirus system pro from your computer, be sure to back up files and system registry. This makes restoring easy in the event that the manual removal goes wrong. While it is best to seek the help of experts it is not impossible to remove antivirus system pro from your system manually.

3rd dangerous Setup shareware, which included spyware and viruses.Despite weird pop-up messages such as: – Warning spyware detected computer!, Dont believe them.Clicking on these pop-ups are likely to begin counterfeited malware scan.

How Did I Get Infected with Alpha Antivirus?

Moreover, a new computer often times come with the trial version is installed correctly, and as such can not be deleted, and uninstall.So imagine the headache if it is not a trial version.

Manual Removal: To remove this fake software, must first remove all contaminated files. Next, you must find all infected registry files. For pav.exe, the DLL files to adjust are wincontrol.dll, msxmlm.dll and msxml71.dll, and will normally be located in the LOCAL_HKEY_USER folder in your registry. Next, delete all program files in the Programs/Personal Antivirus folder and all associated files in the Application Data folder.

Are some tips you can take to improve performance in laptops: 1st Free hard disk space.Cleanup is one of the tools available for Windows, which helps to clean your laptop’s hard drive to delete unnecessary files.To run this utility, click Start, and then click Run.-type cleanmgr Run window and click OK.
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Various Types of Computer Viruses

November 29th, 2011 No comments
There are Different Types of Computer Viruses could be classified in (origin, techniques, types of files they infect, where they hide, the kind of damage they cause, the type of operating system or platform they attack) etc. Let us have a look at them…
Different Types of Computer Viruses

Enlarge Image
Computer Virus is a kind of malicious software written intentionally to enter a computer without the user’s permission or knowledge, with an ability to replicate itself, thus continuing to spread. Some viruses do little but replicate others can cause severe harm or adversely effect program and performance of the system. For more details visit to www.change-ur-mind.com .A virus should never be assumed harmless and left on a system. Most common types of viruses are mentioned below:

Resident Viruses
This type of virus is a permanent which dwells in the RAM memory. From there it can overcome and interrupt all of the operations executed by the system: corrupting files and programs that are opened, closed, copied, renamed etc.

Examples include: Randex, CMJ, Meve, and MrKlunky.

Direct Action Viruses
The main purpose of this virus is to replicate and take action when it is executed. When a specific condition is met, the virus will go into action and infect files in the directory or folder that it is in and in directories that are specified in the AUTOEXEC.BAT file PATH. This batch file is always located in the root directory of the hard disk and carries out certain operations when the computer is booted.

Overwrite Viruses
Virus of this kind is characterized by the fact that it deletes the information contained in the files that it infects, rendering them partially or totally useless once they have been infected.

The only way to clean a file infected by an overwrite virus is to delete the file completely, thus losing the original content.

Examples of this virus include: Way, Trj.Reboot, Trivial.88.D.

Boot Virus
This type of virus affects the boot sector of a floppy or hard disk. This is a crucial part of a disk, in which information on the disk itself is stored together with a program that makes it possible to boot (start) the computer from the disk.

The best way of avoiding boot viruses is to ensure that floppy disks are write-protected and never start your computer with an unknown floppy disk in the disk drive.

Examples of boot viruses include: Polyboot.B, AntiEXE.

Macro Virus
Macro viruses infect files that are created using certain applications or programs that contain macros. These mini-programs make it possible to automate series of operations so that they are performed as a single action, thereby saving the user from having to carry them out one by one.

Examples of macro viruses: Relax, Melissa.A, Bablas, O97M/Y2K.

Directory Virus
Directory viruses change the paths that indicate the location of a file. By executing a program which has been infected by a virus, you are unknowingly running the virus program, while the original file and program have been previously moved by the virus.

Once infected it becomes impossible to locate the original files.

Polymorphic Virus
Polymorphic viruses encrypt or encode themselves in a different way (using different algorithms and encryption keys) every time they infect a system.

http://www.the-spam-files.com
http://www.positive-idea.com

This makes it impossible for anti-viruses to find them using string or signature searches (because they are different in each encryption) and also enables them to create a large number of copies of themselves.

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Algorithms that enable Antivirus Software to use heuristics to detect new threats

November 29th, 2011 No comments
Algorithms that enable antivirus software to use heuristics to detect new threats

Network communications are mainly subject to protocols, to which the software complies to enable two way communication. For example, when browsing the internet, the http protocol is used to get the elements of the page we want to view over port 80 of the socket network connection created to the computer which has the IP address associated with the page’s address name. When you browse the net and a flash application starts to download itself, it is allowed to do so because it is known to not be able to insert any dangerous programs into memory. It is being run from the browser’s window, so it is being identified as the browser by the firewall. That is why you must take extra care when downloading browser plug-ins and similar dangerous programs, because lacking an intelligent security system, there will be nothing to prevent a spyware browser plugin to download some more spyware to your computer.

What would an intelligent antivirus suite do to prevent such situations? It would test to see if the browser you are using has any dangerous plugins in its memory space, and possibly note the state that was found, and then not check anymore so as not to slow down the computer but track if the browser was restarted by checking it’s process id every time it tries to access the internet. Browsers don’t have the possibility to include plugins in themselves without the need to restart, and this is the reason why. If some kind of program makes it onto your computer, and cheats you into allowing it to access the Internet, what then? Then there should be a way for the antivirus to detect known patterns of behaviour typical to viruses and other malicious software, and suggest that some action be taken or just act upon its detection and prevent the program from accessing Internet, asking the user if he is sure that is what he wants. But what if the user doesn’t know what he wants, and doesn’t want to learn what not to do? They are working on that one.


Algorithms that enable antivirus software to use heuristics to detect new threats

Network communications are mainly subject to protocols, to which the software complies to enable two way communication. For example, when browsing the internet, the http protocol is used to get the elements of the page we want to view over port 80 of the socket network connection created to the computer which has the IP address associated with the page’s address name. When you browse the net and a flash application starts to download itself, it is allowed to do so because it is known to not be able to insert any dangerous programs into memory.
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What AntiVirus Software Consists Of

November 28th, 2011 No comments

Anti-Virus software consists of programs on your computer that make an attempt to identify and keep computer viruses off your computer.The anti-virus software will most likely use a couple of different techniques to make sure the viruses stay off your computer. The software will start to scan all your files you have saved so that it can search for known viruses that will match definitions in a dictionary made only to detect a virus.Having anti-virus software will protect your computer from any virus an unknown person could give you.

The software will identify suspicious behavior from any computer program that might show signs of infection.These analysis may also include data captures,port monitoring and other methods that you may or may not be familiar with.Almost all commercial anti-virus software use both of the following approaches,with an emphasis on the virus dictionary approach.

The approaches are first the dictionary approach second suspicious behavior third other approaches.In case your wondering if we are talking about your computer or your children,we are definitely describing your computer although you may get a little laugh while reading this and thinking this computer is as bad as my children can be sometimes. At least for our computer we can get an anti-virus which will help solve a lot of the problems that can occur when you have a computer.

I have talked about the dictionary approach,now let me explain what this is.If there is a piece of code in your file matches any virus identified in the dictionary,then the anti-virus software can take one of the following options.It will first attempt to repair the file by removing the virus itself from the file.Next it can quarantine the file,such that the file remains inaccessible to other programs so that it’s virus can no longer spread.

Anti virus software can be very expensive so please make sure that you shop around to make sure that you get the best deal that there is available to you. It is important to keep your computer functioning properly over time and by using this type of software you can easily do so, without so many threats occurring each time that you are on the internet trying to enjoy your time.

Third it will delete the file that is infected.So you can achieve the success consistently for the medium to long term,the virus dictionary approach does require periodic generally online downloads of updated virus dictionary entries.You should also know that a system administrator can typically schedule the anti-virus software to examine or scan all the files on your computers hard disk drive,and it can do this all on a regular basis.

Although the dictionary approach can effectively contain virus outbreaks in the circumstances,virus authors have always tried to stay a step ahead of such software by writing oligomorphic,polymorphic and most recently the metamorphic.Use your anti-virus at least two or 3 times a week so your computer can be protected now and future use.ed messages. But over the years, the problem has exploded and now affects billions of email users and businesses each day.

By one estimate, only about 15% of email is truly wanted and needed by the end receiver. Companies have come to realize this inefficiency cannot be supported over the long-term and are turning more and more to professional software protection options for help. Anti virus programs are highly useful to so many people using computer systems in their homes or at their offices.

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Computer virus

November 28th, 2011 No comments
A computer virus is a small software program that hampers the performance of your computer. It can be easily spread from one computer to another. It may corrupt or erase data on your PC, can delete everything on the hard drive and use an e-mail program to spread the virus to other computers.

Computer viruses are most easily transmit by attachments in e-mail messages. Therefore, it is recommended never to open an e-mail attachment unless you are sure who actually sent the message. They can be disguised as attachments of funny images, greeting cards, or audio and video files. Computer viruses can also spread by using downloads on the Internet. They can also be concealed in pirated software or in other files that you may download.

You can face the following problems if your PC is infected with computer virus:

Windows would not start even though any system changes are not made by you or you have not installed or removed any programs.

If there is repeated modem activity. If you have an external modem, and notice frequent light blinking even when you are not using the modem. You may be unexpectedly supplying pirated software.

Windows does not initiate because certain significant files are missing. Additionally, an error message might be received by you that lists the missing files.

The computer sometimes stops responding before the desktop icons and the taskbar appear.

The computer is running very slow or it takes longer than expected time to boot.

Even though your PC has sufficient memory, you receive an out-of-memory error messages.

Programs are installed mistakenly.

Windows restart unexpectedly.

A disk utility such as Scandisk reports several disk errors.

A partition vanishes.

You cannot initiate Windows Task manager.

Antivirus software shows that a computer is infected with a computer virus.

Note: These problems may occur due to problems in Windows that are not caused by a computer virus.

Your computer against viruses can also be protected by using a secure Internet connection and by combining it with a firewall which is not difficult to install. You can take the benefit of antivirus software and updates provided by your network, along with the firewall.

To protect your computer against viruses, follow the given steps:

Turn on the firewall on the computer

Keep the computer system up-to-date.

Use updated antivirus software on the computer.

Use updated antispyware software on the computer.

About Author:

I am tech support specialist for iYogi, a leading IT support based in India, iYogi provides pc support services via phone and remote access for home users and small businesses worldwide. To install antivirus software visit iYogi.net or call on 800-237-3901 .

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