text: Microsoft said you shall upgrade the Windows XP to be the latest service pack. For more information just click this link http://support.microsoft.com/kb/317326\n\nIf the above idea doesn't helps you then you can try to upgrade the driver of your hardwares, remove your hardware on PCI slots and RAM then use a rubber to clean the steel line(the side that uses to plug in to your motherboard) on them. \n\nAnyway, the second suggestion for someone who knows well about hardware. If you are not sure to do it then you shall send your PC to the computer fixers.\n\nHope this helps