What is a computer Virus?

Files on your computer that give it harmful commands. Click here to view our quick guide on viruses and how to beat them. Error Messages "No DNS entry": An error message that means your browser couldn't find that address. DNS stands for Domain Name Server, a techie term for server. "Server is down or busy": Another error message. It means the computer you were trying to access is either busy or not on-line. Click here to go back to Ask your Internet trainers 

Web definition:

Destructive programs that disrupt the normal functioning of computer systems.


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