Hi everyone. I have a problem concerning a BSOD when any game (or 3D application) starts up, where a few seconds after I start the game/application, windows shuts down and a BSOD displays, stating there is a 'page_fault_in_nonpaged_area' which results in my computer being restarted after a count reaches 100 for deleting physical memory. I have recently made some major upgrades, which is when the problem started. I installed a new mobo, video card (as old mobo had onboard video and no PCI-e slots), and a gig of RAM. Since the problem I have bought a new PSU and another gig of RAM to replace the other stick I bought to check if it was faulty. My Specs (since upgrade) Intel Pentium 4 3Ghz Windows XP Home SP2 Kingston DDR2 2GB 800Mhz Asus EN8800GT Gigabyte P31-DS3L Antec NeoPower 550W PSU Western Digital IDE 160GB 7200RPM HDD Nothing is overclocked. I didn't reformat after I installed all the new parts, rather removed all the old drivers beforehand and installed the new ones after. What I've tried? Ruled out PSU and RAM problems. Thats...about it Another note: Interestingly, games DO work (at least Steam ones) when I set them to launch windowed and at 800 x 600 resolution. Anything higher results in the aforementioned BSOD. Next thing I'm considering is to reformat, it's been suggested by a few people but not by others... No other crashes experienced, everything's been scanned for viruses and the such, and when playing games in the windowed mode the performance, etc isn't too bad. Think that's it... any help appreciated!