I have just reformatted my windows and installed and now it is run on win xp sp2. But my computer would crash/freeze completely all of a sudden like once every hour or so. I also have antivirus program BitDefender 2008 installed and have just ran its registry scan/cleaner. I’m now trying hard to find out the cause and to fix this. I was thinking, could the registry scan/cleaner have messed up the win xp’s registry and thus causing these crashes? Also I’ve noticed every time I shutdown/logoff windows, “spool.exe” would have trouble closing and I would always have to force it to “end now”.