ok i searched for this problem on the forums and found about 26 results but none of them really helped me. today i just downloaded everything 1st from the mirror sites and got a error that the installer corrupted or incomplete this could be result of a failed download or a virus. then i redownloaded from the secondary site and got the same error. i burned the game onto a disk and gave it to a friend who went home and got it installed perfectly fine. all my files are the right size and everything. i think this has to be a problem with a virus because yesterday i deleted about 20 of them and right now my sound card was inactive for about 2 weeks. well i really wanna know if anyone knows a good, small sized anti-virus program which i can try and fix this or another way to fix it. thank you. plz reply asap