I'm also having this issue. I have Windows 7 32-bit. Like with the others, I get a black screen, usually have some sound lockup (buzz), and then the computer acts like it shuts off (quite suddenly), but it's actually still on. I have to reset it or turn it off and back on. I have noticed that for me it only happens in some caves, usually when there is water around. I also notice that the screen will flicker a lot when I am looking at water in caves. This never happens on the surface and most dungeons seem to be ok. I'm not sure if the flickering is related, but it seems to be since that's usually when i get a system crash. I've tried the various fixes mentioned in this thread and around the internet. This is a new install of Win7 too, so I don't think it's being caused by any kind of OS corruption. It's also a new video card. New memory too, for what it's worth. I recently replaced just about everything in my system except the motherboard. Haven't had any issues in other games so far. I'm fairly certain my PS has enough power for my gpu. It's a 650watt PS with a Geforce GTX460. Also, the crashes are apparently preventing event viewer from recording them, so there's nothing in Event Viewer relevant to the issue. Specs: Mainboard : Asus M3N72-D Chipset : nVidia nForce 740a SLI Processor : AMD Phenom II X4 945e @ 3000MHz Physical Memory : 4096MB (2 x 2048 DDR2-SDRAM ) Video Card : NVIDIA GeForce GTX 460 Hard Disk : Seagate ST3500418AS ATA Device (500GB) Hard Disk : IC35L120 AVV207-0 (124GB) Hard Disk : SAMSUNG HD103SJ (1000GB) Hard Disk : Seagate Desktop (2000GB) Hard Disk : Western Digital WD3200JB-00KFA0 (320GB) DVD-Rom Drive : ATAPI iHAS124 A Monitor Type : LM05 - 19 inches Network Card : Nvidia MCP77 Ethernet Operating System : Windows 7 Home Premium Home Edition Media Center 6.01.7601 Service Pack 1 (32-bit) DirectX : Version 11.00