Its been working fine for ages, this only started a little while ago, I'm not sure if its a software which one it is!? I've had a few different reasons why it says its BSOD'd. The main one being QUOTA_UNDERFLOW, with the occasional BAD_POOL_HEADER and one other which a cannot remember. At first it seemed as if it was only whilst playing games, but now its just anytime. I've done a memory test with 10 passes. I've fixed bad sectors on my hard drive. I've just dusted my computers innards just now, I don't know if that has helped yet. Sometimes its very quickly after its been turned on, sometimes a few hours, sometimes it doesnt do it. Specs: Chieftec A-135 Series 550W Modular 80plus Certified PSU with 14cm Fan Samsung SH-S223L 22x DVD±RW DL & RAM with LightScribe SATA Optical Drive - OEM Black Intel Core i5 750 2.66GHz Socket LGA1156 8MB L3 Cache Retail Boxed Processor HIS HD 5770 1GB GDDR5 DVI HDMI Display Port Out PCI-E Graphics Card Hitachi 1TB Deskstar 3.5" Hard Drive - SATAII 7200rpm 32MB Cache Kingston 4GB (2x2GB) DDR3 1600MHz HyperX Genesis Memory Kit 1.65V CL9 Kingston 8GB (2x4GB) DDR3 1600MHz HyperX Genesis XMP Memory Kit CL9 1.65V Asus P7H55-V H55 Socket 1156 VGA HDMI Out 8 Channel Audio ATX Motherboard I have two mini dump files as well.