This could help.

I scanned my brother's computer last night and hell it found 38 viruses! 0.0 38? Most of it are games downloaded from various websites. So take note: Don't trust an untrusted site even if the program looks so uber cool. So people, at least scan your computer once a week. You never know what just might destroy your system.

Click here to install:

Avast! Home Edition 4.8.1229
or
AVG Free Edition 8.0.175

Serials can be found here. :)
Don't mind the nude pictures. It's just part of the website.