Hi, (first post here on techspot) Let me explain my problem. When I start my pc, everything is fine and works fine. I have a folding@home client running, my pc was up for 5 days non stop folding on my gpu but this night again I had a bluescreen. Now it was: 0x0000000A. But it is not the first time. Sometimes I have 1 bsod in a month, sometimes 2 in a day or 1 in a week. I ran memtest86+ and didn't find anything, same with Windows Memory Diagnostics Tool. I removed all hardware added it step by step, checked if it booted and if it had errors or had system beeps, but everything was fine. This is my pc config: Windows Vista x86 + SP1 2x 1GB ram Core2Quad Q6600@2.40GHz nvidia geforce 8800gts Case (with PSU): Case A-Open QF50E Black 400W Power Supply: 300/350W ATX(Ball bearing fan), UL/CSA/CE/VDE/S/D/N/ FI/FCC /DoC certified more details are in the dumpfiles (attachment) bsod messages that I had: 0x0000000A (this night) Some older ones (I don't know if these bsod below still happen because I removed antivirus, removed some drivers etc so the only bsod I had until now after removing some software was this one above (0A)) Code: Problem signature: Problem Event Name: BlueScreen OS Version: 6.0.6001.2.1.0.256.6 Locale ID: 2067 Additional information about the problem: BCCode: a BCP1: 0000002C BCP2: 00000002 BCP3: 00000000 BCP4: 81CA0CFD OS Version: 6_0_6001 Service Pack: 1_0 Product: 256_1 Code: IRQL_NOT_LESS_OR_EQUAL *** STOP: 0x0000000A (0x0000002C, 0x00000002, 0x00000000, 0x81C95CFD) Code: MEMORY_MANAGEMENT PFN_LIST_CORRUPT STOP: 0x0000004E (0x00000099, 0x00077c88, 0x00000003, 0x0004593B) Code: MEMORY_MANAGEMENT 0x0000001A (0x0000888A, 0xA7FAC018, 0xC03695C8, 0x83B1A3E8) Code: MEMORY_MANAGEMENT STOP: 0x0000001A Problem reports and solutions from windows gave me a solution and told me it was my antivirus (removed mcafee, still the same) Some say it's my memory (but that doesn't give errors), others say it's my power supply unit, others say it's an audio driver, some say it's just vista, etc.. It would be very nice if I knew what was the problem (I check windows updates every 2 or 3 days, I have all the latest updates I guess). The attachment are the dump files from the bsod this night (the most recent one). I hope somebody could help me.