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What is a Computer Virus?

By definition, computer viruses are executable programs that can reproduce or replicate and disrupt a computer’s normal operation. The spread of computer viruses started in the late 1970’s when floppy disks were used widely by computer owners to exchange and save files. Viruses were primarily transferred to another computer through this mode of storage. Viruses attach themselves on any part of program especially those which are executed upon starting up a computer. At present, viruses are transferred through networks and the internet.

How Does A Computer Virus Work?

There are two types of viruses and they are identified on the way they replicate once they come in contact with your computer’s hard drive. These types are known as “Nonresident viruses” and “Resident viruses”. The difference between these two are explained below.

Nonresident Computer Virus

A nonresident computer virus is also known as a finder virus. It is consist of a module that searches and infects a new file that is compatible to its configuration and a module that replicates and infects any executable file that the finder module is able to find. This type of computer virus is harmful because it usually operates as a background program and is not easily noticed by any computer owner.

Resident Computer Virus

A resident computer virus also contains a module for replication but it doesn’t need to be summoned by a finder module. The virus program is simply loaded to the memory, once it is executed and does the same infecting process to other files; it will be doing the same process every time you use the affected programs on your PC or even every moment that you turn your machine on. This type of virus is capable of infecting a lot of files on your computer with the use of a fast infector, but doing so will also increase the chances of it being detected by an antivirus program.

What does a Computer Virus Do?

A computer virus infects files on your computer especially those that are used in the boot up process. Once a computer is infected by a virus, processes become slower to load and programs become more susceptible to “crashes” and internal memory errors. Other computer viruses may also erase or corrupt important documents and files on your computer making it inaccessible. Still, there are powerful viruses that can totally erase your hard drive’s memory and even damage your computer’s hard disk.

 

Preventing Computer Viruses

Computer viruses are quite easy to prevent using antivirus programs. There are lots of antivirus programs available on the internet today which can be purchased using a credit or a debit card. Installing an antivirus program is an effective way of preventing computer viruses from spreading in your computer’s memory. USB antivirus is also useful in preventing the spread of viruses through a USB mass storage device.

Performing a regular wide memory scan will also lessen the chances of any computer virus from spreading. Viruses are normally detected by your antivirus program and are immediately moved to a place where it is incapable of executing itself and infecting other important files in your computer. The antivirus software you purchased is also capable of deleting viruses and other malicious programs from your computer.

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Computer Viruses are unwanted self-replicating program that infects your computer without you knowing it. There are thousands of viruses luring around the internet at present which may enter your computer anytime it finds an opportunity. Anything that is unwanted should be removed, quarantined and deleted from your machine’s memory.

Viruses are not only unwanted, they are also harmful and destructive. How will you remove one that is already on your computer’s hard drive? A thorough knowledge on the “how to’s” can save you a lot of money in repairs!

Check this related article: What are Computer Viruses

Computer viruses are found anywhere in the computing and internet space. From USB’s to emails, free software and the like. It is almost impossible to distinguish these tiny, self-replicating executable programs. The only way to know it is when your machine is already infected and starting to slow down. Although virus protection software are available, the free version you might be using is incapable of detecting the more advanced viruses.

How Computer Viruses Work

We found this video that explains how viruses work. The video is a bit outdated, but the concepts remain relevant. Current viruses, though, use social engineering to infect machines. You should never click on an email link or a pop up ad. Instead, type the web address by hand in your internet browser to make sure you are not being redirected to an infected website.

Ways to Remove Computer Viruses.

Remove Worst Computer Viruses using Windows Restore

Windows operating systems like XP, Vista and Windows 7 are designed to have a System restore tool which is very useful once your computer becomes infected by a virus at one point. This tool works by restoring an earlier image of your operating system. This is done by turning on your machine and booting on the system restore option. Your system will be automatically restored to the state before it was infected by the virus. Once the restore process is done make sure to perform a wide scan on your memory and remove all detected viruses.

 Registry repair virus removal

There are also instances that a virus attacks your computer’s registry making your computer slow and hang most of the time. A simple way to remove the virus that causes this is by downloading free registry repair software or just letting windows do the process. After the registry repair, do the wide scan and remove all detected viruses.

 Removing a virus using your antivirus software

Remove Computer Viruses Antivirus software can also most recent computer viruses from your computer. This is done by simply doing a full scan on your machine’s memory. Once the scan is done, the software will automatically move the malicious files into a virus vault. If you are using a professional version, you can choose to delete the viruses detected and solve the problem right away although viruses which has infected the computer before the antivirus software was installed can, either infect the software or will not be detected by the software itself.

 Reformat

 If you really want to clean up your system then reinstalling your operating system is a very effective way. This is done by totally reformatting your computer’s hard drive which means that all of the files saved and those which has been infected will be totally removed from your computer, that is why a system restore and a back-up folder is recommended to be saved on another partition. Once your drive has been reformatted, you can insert your software installation CD on your built-in or portable DVD drive and boot up your computer using the CD by pressing F10. The re-installation process will start automatically and all the viruses will be removed.

If you cannot fix it yourself

In some cases, the sole idea of trying to fix a virus yourself may scare you. We can help you with virus removal and many other services either by phone and remote support, at your home or place of business or in our locations in Gaithersburg, MD or Vienna, VA.

We are happy to answer any questions about Computer Viruses or help you Repair a Computer Worm Infection. Please give us a call, we are standing by to help.

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