A computer virus is a type of malware that spreads by infecting files and can cause harmful activities on affected systems, leading to slow performance, data loss, and crashes. Viruses spread through email attachments, shared files, and infected documents. To protect against viruses, it is recommended to use antivirus software, maintain firewalls, regularly update systems, and avoid questionable websites.

1. Computer Viruses

2.  A computer virus is malware program that spread by infected files
or attachment.
 when this program is executed, it replicates by inserting copies of
itself into other computer programs, data files, or the hard drive.
 The affected areas are said to be "infected".
 Viruses perform some type of harmful activity on infected hosts.

3. Malware Classification

4. Symptoms Of Computer Viruses
 Slow Staged Computers
 Turbulent PC Conducts
 Loss Of Data Unexplored
 Periodic Crashes In PC'S

5. Boot & Program Viruses

6. Ways Virus Spread
 E-mail attachments
 Shared files
 Disks
 Infected Documents
 Infected word processor

7. Virus Attack Statistics

8. Virus Protection
 Use antivirus protection
 Use firewall
 Get antispyware software
 Keep your antivirus protection software up-to-date
 Update your operating system regularly
 Avoid questionable Web sites

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