Hi hanguker

I don't know what the problem is but maybe if you follow this thread there may be a solution http://www.techzonez.com/forums/show...&threadid=8162

How much ram do you have ? how much is allocated to the running processes now ? is your ram good ? have you tested it ?

If your hardware is fine then try System restore and sfc /scannow. If they don't work then maybe you should do an XP repair.