Shorly (about two minutes) after booting, my Windows XP SP2 system blue screens. Usually it is a DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1) error. Occasionally it does not blue screen. If it doesn't BSOD shortly after booting, it will not BSOD until the next boot. It doesn't matter whether I log in or not. I don't believe it's a hardware problem (power, memory, overheating) because the BSOD always happens at the same time. In addition, I'm using ECC RAM, so I doubt it's a memory problem. Adding and removing hardware seems to have little effect on the BSOD. I have followed the instructions for removing the page files, defragmenting, and recreating the page files. I could not attach the minidumps I wanted to (too large), so instead I have uploaded them here: http://scarey.fastmail.fm/unlisted/rehevkor5dumps.zip Most of the minidumps are attributed to ntoskrnl (KeContextToKframes), but I did not include all of them. Instead, I included a wide variety of minidumps which have all happened in the same way. Any help is greatly appreciated! If anyone wants more info, I'd be happy to provide it!