To delete the virus, please download the program Happy99 Cleaner by clicking here . After downloading the program, run it, and then follow the on screen instructions. After the program is finished, the computer will need to be restarted. Once Windows loads back up, Happy99 Cleaner will display a listing of all the people that may have been sent the virus from your computer. Please send an email to these people, as well as a link to this page, telling them how to clean the virus off their systems.
Viruses typically infect other programs in order to propagate.
Happy99 is actually classified as a worm, which does not have this limitation. Since it also pretends to be a harmless program, it is also classified as a Trojan Horse.