Yesterday I as using my pc all was running well and while running a few programs (no more than usual but not a overbearing load) The desktop froze did not change for a few minutes so hardbooted. On restart recieved BSoD. Tried last good config and safe mode at various points after startup recieved BSoD no more than a few minutes(gauged by enough time to activate spyware scanner and get a couple minutes in at most) occationally at enter password screen. Pluged hdd into laptop and ran malware bytes on it no problems. Pluged back in and ran normally got BSoD immediatly before entering password(sometimes comes before sometimes after) Flashed CMOS battery this morning no results. Running windows vista ultimate 32bit BSoD is as follows Machine_Check_Exception ... ... ... Tecnical Info: STOP: 0x0000009c (0x00000001, 0x851b64c0, 0xb6000000, 0x00000181) Any help?