Ishiyoshi, thank you very much. You have solved my problem! It is indeed the NVIDIA drivers that caused the problem. I must have updated it thru windows update. When I check the date of the driver, it was july 2004. Seems to be quite a new driver. So I decided to use my old drivers. Took out the cd that came with my graphics card and loaded it in. Old driver and everything works now. StEaLtH, my motherboard is from asua p4b. Not really sure about the chipset. Maybe 845 series. Anyway, I think it could be the graphic card driver problem. Check the date of the graphic card driver, try using a older one. It worked out for me.