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Inconsistent BSOD/Freeze/Restart issues - Fresh OS Install didn't fix
I've been having some issues with my PC BSODing or restarting randomly. My computer specs are:
CPU: Intel Core 2 Quad Q8400
Motherboard: Asus P5Q SE PLUS
Memory: 2x2GB Kingston HyperX DDR2
Graphics: Nvidia GeForce GTX550 Ti
WiFI: Intel® Centrino® Wireless-N 2200
Hard Drives: WD160GB (OS & Programs)
WD500GB (DATA)
WD4TB (DATA)
Optical Drive: Old Toshiba IDE DVD-RW
PSU: Coolmax M-500B (500W)
Firewire: 4-Port Firewire PCI card
External: PreSonus FIREPOD 24BIT/96K Audio Interface (Connects to the Firewire PCI card)
OS: Windows 7 Ultimate
I've been troubleshooting this for a while now with absolutely no success. I'm running an aftermarket CPU fan and as far as I can tell my temps are OK (SpeedFan + Physically putting my hand around the vents). I'm NOT overclocking. I have done full scans with Bitdefender and MalwareBytes. I've checked my C: drive for errors. I've updated my GPU and Wifi card drivers. I even did a fresh install of Windows 7 Ultimate. I typically run a dual screen setup but BSODs occur even with only one screen and with the IDE optical drives completely disconnected.
Some more specific actions I've taken are:
Updated ASACPI.sys (known to cause BSODS)
Switched over to the 1394ohci.sys Legacy driver (for my firewire device)
I've run the driver verifier which resulted in the PC freezing instead of BSODing.
Run memtest as well as Hot CPU Tester, both without complaint.
The BSODs don't happen when I'm running a specific program, I honestly can't find a correlation between them and my activity. Sometimes they occur when my PC is completely idle and I'm not using it.
WhoCrashed shows me mostly windows system drivers so it's hard to narrow down where the problem is coming from.
Bitdefender recently started to become 'unresponsive' and is marked as 'inactive.'
I will have a second PC this weekend which I can use to swap parts out to see if I have a hardware issue but am posting in these forums with the hopes that someone might have some insight or advice. Maybe I overlooked something stupid I'm getting a little crazy at this point so it's completely possible.
Thanks for taking the time to look at my problems.
Any help, advice, or insight are greatly appreciated.
-Ashbrooke