This applies to Windows Vista only... I am unsure if it will work with other operating systems...
First you will need to purchase a new operating system. This can run several hundred dollars, but I bought mine on Ebay for $10. Next go to your computer and click start, then Help and Support. Then simply follow the on-screen directions for taking your computer back to the factory settings. This will successfully remove any viruses as well as any files you may have put into your computer, so it would be wise to back up all files and anything else you want to keep, onto a disk. This option will return your computer to the way it was when it was brand new. The only problem is that it will not replace or reinstall the operating system. Next, install the operating system you recently purchased, and you are good to go. Worked for me! Keep up the good work guys!