A virus is illegal computer code that attaches itself to other software or files and spreads by copying itself to those programs. It can alter or destroy data and spread its damaging effects by attaching to host programs that are then shared, copying the virus. Users can protect themselves by installing antivirus software, backing up files, avoiding email attachments, preparing boot disks, and blocking Word macro viruses.

1. Potentially damaging computer
program designed to infect other
software or files by attaching
itself to the software or files with
which it comes in contact
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2. A virus is illegal computer code that can
do such things as alter programs or
destroy data. Also, the virus can copy
itself onto programs, thereby spreading its
damaging effects.
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4. A piece of software that has a virus
attached to it is called a host program.
Usually the virus is spread when the
host program is shared.
If the host program is copied, the virus
also is copied.
It infects software with which it comes
into contact.
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5. Install a good Antivirus
Back up essential files
Delete e-mail file attachments
Prepare an emergency system boot disk
Block Word macro viruses
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