For a while now my computer has had random crashes (xp blue screens, will crash at random). Now suddenly I cant even play WoW because it says my hd is corrupt. I've tried reinstalling it, it wont even install most of the time, and if I do get it to install, it wont load at all (crashes immediatly citing a corrupt file, different file almost every time). I know that some part in my computer is bad, but I dont know what. I've been putting it off because until now it didnt effect me except for the occasional crash. Usually when WoW crashed before it said that some memory could not be "read" or "written" to. How do I tell what part is bad in my computer without blindly replacing things? Here are the specs Athlon XP 3200 Biostar mainboard (i forget which, box is gone) 1 gig of 400fsb ram (corsair, i believe) geforce 4 5200 video card SB audigy 2 ZS platnum sound card Dual seagate 120gig RAID drives setup in an array.