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A virus is a piece of software designed and written to negatively affect your computer by changing the way it works without your knowledge or permission. Technically, a virus is a segment of program code that inserts itself to one of your executable files and spreads systematically from one file to another. Computer viruses do not accidentally produce: They must be written and have a specific purpose. Usually a virus has two particular functions:
A harmless virus is one that is designed to do no real damage to your computer. For example, a virus that conceals itself until some predetermined date or time and then does nothing more than display some sort of message is considered benign. A malignant virus is one that attempts to inflict malicious damage to your computer, although the damage may not be intentional. There are a significant number of viruses that cause damage due to poor programming and outright bugs in the viral code. A malicious virus might alter one or more of your programs so that it does not work as it should. The infected program might terminate abnormally, writes incorrect information into your documents. Some of the viruses identified are benign; however, a high percentage of them are very malignant. Some of the more malignant viruses will erase your entire hard disk, or delete files. Anti-Virus programs will protect your system from viruses that can harm your system, and also from downloading remote administration or hacking tool files. You need to have the best and latest anti-virus software, and update its database regularly. It is advisable to update its virus definitions everyday before doing anything on your computer. Popular Anti-Virus Programs:
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