2.) Purchase a reputable antivirus program.
3.) After installing an antivirus program, scan your entire computer to be sure it is free of malware.
4.) Update your antivirus definitions regularly ( Most antivirus software will do this automatically).
5.) Always be suspicious of any and all unsolicited e-mail attachments.
6.) Stay informed about viruses and virus hoaxes.
7.) Install a personal firewall program.
8.) Download software only if you are sure the website is legitimate.
9.) Avoid as best you can visiting unscrupulous web sites.
Always always follow these steps when trying to prevent viruses from damaging y computer.