I can only assume the timings were off because the system used to have 2 sticks of RAM from another mfg, and then I adjusted the BIOS to overclock the CPU and memory. Once the BIOS reset was complete, the system rechecked the memory timings automatically and loaded up the appropriate defaults. The solution was resetting the BIOS to factory settings (had to adjust a jumper on the motherboard to clear settings).
We found that even standard system services and user applications were crashing (the SuperFetch service, for instance) at random intervals. The big tip off happened after we scanned memory for the Nth time, it came back with no issues, and then we investigated the Windows Event Logs. This litany of crashes was, in fact, caused by incorrect memory timings in the PC's BIOS. I wanted to leave this answer here in case it helps any of you with your random crashes. I've solved the problem with the help of some experts in another forum. How can I find out what's causing all these blue screens? I've used chkdsk in Windows 7 to scan the C:/ drive on boot (twice) and it found no problems. I've run MemTest86+ from a USB drive for up to nine hours, giving my RAM a total of 6 passes, and it didn't detect a single error. I'm also running Microsoft Security Essentials, which is up-to-date and always present. I've got Windows 7 Home Premium and it's completely patched.
16GB (4 x 4GB) Kingston HyperX 1600 MHz DDR3 RAM.ASUS Sabertooth P67 Motherboard (Rev 2).NTFS_FILE_SYSTEM 0x24 (Ntfs.sys) - this one's new, happend 4 days agoīAD_POOL_HEADER 0x19 (win32k.sys) - also new, happened 7 days ago MEMORY_MANAGEMENT 0x1A (ntoskrnl.exe) - I've seen this 9 times since April 2012 I have recurring BSODs that really have me scratching my head.
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