[QUOTE] Holy shit. Not wishing to crow but you simply wouldn't get this with NTFS. It's designed, from the ground up, to have the power pulled on it. Where power pulled means "instructions just stop arriving at the disk", regardles of whether or not it was caused by a pulled power cable or the CPU losing the plot suddenly. That shouldn't have been a problem, even for a Prescott. Using the stock cooler? Besides, the BIOS will shut the machine down in a (semi) controlled fashion if it gets too hot. Good idea, although I'd be surprised if it was even possible for a driver to completely blackscreen something - and even more surprised if it was an nVidia driver that did it. The next most obvious thing to do is roll back to the old processor, I suspect you have a duff one. If you do rebuild XP think seriously about using NTFS, it *is* a lot safer. Dave[/QUOTE] Well sold the old CPU to a friend, Use FAT due to it being a Dual boot system with Win98se Ran the FULL version of HOT CPU last night for some hours Diagnostic mode, no problems cpu got to 56c. CPU is a new Boxed Northwood 3.2g, preferred this due to the heat problems in the room and the problem with Prescott, like more heat and more power with very little improvements. Yes stock Fan/Heatsink, idle temp around 36c-40c.. I was getting a lot of no responding things days before this all happend and found 2 viruses but I don't think they were working.. CPU Temp was OK at that time..