Okay.. the problem I am having with my PC is that when I turn it on it gets all the way to the desktop, hangs there for a minute or so (I have seen it last up to 10 minutes) and then restarts itself. After it's done this a few times I hit F8 and try to get it into Safe Mode. Occasionally it lets me in but most of the time it hangs on mup.sys and won't do anything after that. This problem originally started after my CD drive died and I replaced it. Since then I have removed the CD drive altogether and the problem is ongoing. EDIT: Managed to get it on temporarily and encountered this error while trying to play World of Warcraft: This application has encountered a critical error: ERROR #132 (0x85100084) Fatal Exception Program: C:\Program Files\World of Warcraft\WoW.exe Exception: 0xC0000005 (ACCESS_VIOLATION) at 001B:007196B4 The instruction at "0x007196B4" referenced memory at "0x00000212". The memory could not be "read". Any ideas?