I was playing battlefield 2 after i recently reformated and added a hard drive and a sound card. it then shut down when my game got done loading. i had to shut off my power strip for about ten seconds and then it would start up. after it happened twice my game would work fine. then today i start it up and it asked for my windows XP regrestration code then one of the hard drives starts clicking so i shut it down. i then did the regrestration code and it worked fine except my hard drive didn't stop clicking. how can i fix this?