Hello, I am having random BSOD crashes in vista. Seems to be occurring every couple of hours to every couple of days. Here's what I've done so far: Memtest+86 - ran overnight with no errors. around 13 passes I think. Prime95 - ran 15+ hours with no errors Furmark - ran for around 15 minutes. GPU maxed out at round 82 C Spinrite - disc checked out ok Windows chkdsk /r - no errors Updated chipset and graphics drivers Here are the system specs: Gigabyte GA-EP35-DS3L - F5 bios Intel QuadCore Q6600 2.4 GHz Western Digital 150 GB Raptor WD1500ADFD 2x2 Gb OCZ Reaper HPC NVIDIA GeForce 8600 GT 256 MB some LG dvd burner 380 Watt Antec PSU Here is the latest BSOD report: Problem signature Problem Event Name: BlueScreen OS Version: 6.0.6001.2.1.0.256.6 Locale ID: 1033 Extra information about the problem BCCode: 3b BCP1: 00000000C0000005 BCP2: FFFFF96000165AA5 BCP3: FFFFFA6009D3D1B0 BCP4: 0000000000000000 OS Version: 6_0_6001 Service Pack: 1_0 Product: 256_1 I've done a little debugging. WinDbg seems to be blaming several different main windows components. I don't know how to dig deeper to find the underlying root of the problem. I've attached the last five minidumps. Any help or suggestions are greatly appreciated.