Antivirus is a computer software that has the capability to prevent and protect your computer from dangerous malicious codes. This software can offer a peace of mind even for experienced computer users, who doesn’t want to mess up with viruses.
Antivirus programming works in two different ways. Firstly, it has a huge "lexicon" of virus database and it sweeps the files and documents in a system and tags them if they are known to be viral and also it screens the framework of any suspicious action. Another technique includes -making a bait document in critical file systems and monitor about any changes to the document. It has the ability to identify any user interventions and also the changes from any external sources.
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Once these file extensions downloaded from Internet and executed in your local PC – these viruses gets loaded additionally along with the original files. The second category is those that can infect system files or boot-records. The third one is the Macro viruses which are typical- these viruses can insert unwanted words or phrases in a word processing system application.
Enough reading viruses! Let’s return to anti-virus once more.
The anti-virus examines the files by employing a virus wordbook as the target here to seek out the noted viruses. In the second technique, it identifies the suspicious behavior of any computer program that indicates the infection in the computer.
Virus wordbook approach
A wordbook of noted viruses has been created by the author of anti-virus software package. Once anti-virus software package examines a file, it then refers to the current wordbook. Just in case, a chunk of code within the file matches with the virus known within the wordbook then anti-virus either deletes that file or quarantines it. So this infected file becomes inaccessible to alternative