I know a person who had a similar problem, he disabled lots of devices in his system, that did not fix the problem. He then converted to NTFS, and bingo, it now works perfectly. Il see if i can get him to join here and post more info on his exact system specs and what games But if your drive supports it, it cant do any harm to convert to NTFS anyway (if im wrong in this case: correct me, i thought NTFS was better for systems that can support it)