...oh, now this is embarrassing to have as a first post. With minidumps attached, no less. My otherwise rocksteady XP based Opteron driven PC has developed an odd habit of BSODing on (a) a couple of games (b) large computational operations on media files (like editing video or converting DVDs to AVIs) (c) uninstalling or reinstalling some large programs. I've tried more or less EVERYTHING to fix it, and I'm preparing for a complete windows reformat and reinstall at the moment... but one of the things I need to do before that is backing up some large files to my USB drive, and *surprise* the machine BSODs on that too, as a large file operation. The weird thing is that the computer benches through torture tests without even breaking a sweat - EVEREST, SANDRA, MEMTEST86+, NTune system test - it'll run any of these overnight, without any errors or even more than a couple of degrees in heat. I can run HL2, and other similarly demanding games, without even a blink. Though NWN2 crashes it every time, interestingly enough. I'm wondering if it's a dual core issue. Or HDD. I'm stumped. I've reseated the CPU, changed RAM slots, eased off RAM timings, checked my new 520Watt Enermax PSU's rails, checked all the wires and circuits, installed dual core patches, uninstalled dual core patches, the works. I've removed the pagefile, defragged, reinstalled the pagefile, blown dust out, checked the pins on the CPU and contacts on the RAM... you get the idea. System: CPU: Opteron 180 Chipset: MSI K8N Neo2 Platinum GPU: Geforce 7800GS AGP HDD: IDE Quantum Fireball 12GB, IDE Samsung 160GB, SATA unknown brand 300GB PSU: 520W Enermax Anyone? All I need is it to be stable enough to run backups to the USB HDD. Recent minidumps attached.