How does antivirus software work?

How does antivirus software work?


Background Scans.  Antivirus software scans all files you open in the background.  This is often called access scanning.


Full System Scans.  These scans are usually done at a preset time and scans all your files.  These are essential if you have updated your computer or antivirus software recently.


Virus Definitions.  These are footprints that identify a particlar virus.  As new viruses are released into the wild, antivirus companies also release their signatures to compact them.


Regular updates.  It is important to update your antivirus software on a periodic basis as new viruses are always showing up.  It is important that your antivirus software have the most current virus definitions.


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