First, if you haven't used the tool below, download, install, update, then run a full system scan with the free malware removal tool below.. Run it repeatedly, till it finds nothing.
Malwarebytes Antimalware
Once that's done, download the registry fix tool using the instructions below:
Go to the link below and scroll down to line 12 (left column) and click on "EXE (lnk and regfile) Fix for Windows XP" to download a reg file fix. Save the REG File to your hard disk. Double click it or right click it and choose "merge" and answer yes to the import prompt.
http://www.kellys-korner-xp.com/xp_tweaks.htm
Hope this helps.
Grif
Whenever I try to open any of the programs I get an error message "Application Not Found". I got this problem when my computer was attacked by a virus. Can somebody suggest me the solution to overcome this problem. My operating system is Windows Vista Business.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic