Hello, My computer refused to start on Monday and I ended up getting a new mobo, cpu, memory, PSU and hdd. I also upgraded from Vista to Windows 7. I first started getting BSOD-problems when I booted the new setup on the old hdd with Vista. I assumed it was a driver error, so I did a clean install of Win7 on a new hdd. I have installed only the drivers that came on the disk with the mobo plus the latest nvidia driver, a few essential programs like winrar, bsplayer, f-secure, messenger and minecraft (obviously) and copied a whole bunch of files over from the old HDDs. I have updated the bios to the most recent version using the windows-based tool that came with the mobo. I'm currently getting an assortment of BSODs at various intervals (can be 10 minutes, can be 5 hours). I have gotten: IRQL_NOT_LESS_OR_EQUAL 3 times MEMORY_MANAGEMENT PFN_LIST_CORRUPT SYSTEM_SERVICE_EXCEPTION 2 times These occur seemingly at random. I ran a furmark test to see if my gpu would overheat and crash, but it didn't (only ran it for maybe 20 minutes though) and the temp never rose above 58 degrees C. I have run Memtest86+ a total of maybe 20 passes with various configurations of my 2x2 gb Kingston DDR3-1333, and gotten a total of one errors. I'm attaching a few files that may be of assistance. My specs: M4A77T/USB3 (new) Phenom II 840 x4 3.4ghz (new) 2x2gb Kingston DDR3 1333mhz (new) 9600 GT 512mb (old) DVD-drive (old) 1tb Samsung sata (new) 500gb sata (old, was secondary hdd, not the one with OS) Chieftec 450W PSU (new) I'm at my wits end with this, could anyone help me?