Wasup ppl.. I'm having dificluty installing any operating system on my computer.. I have a p4 2.4 system which worked great untill my fn friend installed his hd on my comp to see if it would work on mine, cuz his wouldn't.. ever since my comp hasnt worked, but it goes through the boot up seqeuence and halts when coming to operating system.. so I formated the hd without any problems, and now cannot install any operating system.. the most recent error mssg i got was "cannot copy wmilib.sys" which is on winxp pro... im thinking it may be some serious virus, but i would think that a fresh install would help, but not so.. pls help