My brother has been having some BSOD issues lately and I've been working with him to resolve the problem. He's 6 hours away and has no alternative hardware readily available at this point. I've exhausted all my ideas, so I need yours.
System Specs:Asus M4A88TD-V Evo
(Latest BIOS 2301)
Athlon II X3 450
OCZ Vertex 3 120GB
WD 500GB data drive
Wireless: TP Link N600
Sound: Asus Xonar DG
Graphics: AMD 7770
OS: Windows 7 64-bit
He built the computer about 1.5 years ago. Has been running smoothly up until about a month ago. Graphics card was upgraded to 7770 in late-May. Current wireless card installed not long thereafter, SSD has been in for over a year. (Basically no hardware has changed since June)
About 3 weeks ago he started having frequent BSODs; usually when watching videos from youtube or the hdd (nearly every time he watched a video for almost a week straight). BSOD error code was F4 (registry error?). He asked me for help. I had him run cc cleaner, scanned for viruses, ran MemTest for over an hour with no errors. He mentioned that he was receiving frequent messages on startup and after BSODs about "Could not find correct boot device, please insert a boot device and reboot." I had him reset CMOS, updated BIOS, power-cycled SSD. Still getting the same error until he found that the SSD had somehow been removed from the boot list. Although adding the SSD back into the boot list allowed him to boot into Windows, it didn't resolve the BSODs, so he ended up reinstalling Windows.
After reinstalling Windows and all his programs/drivers/windows updates, the computer worked fine for about a week. Last Thursday, he got another BSOD while watching a YouTube video (same F4 error code). Same symptoms (video stopped, computer froze, BSOD). At that point I was thinking it may have been a graphics driver issue so I had him install the latest 13.10 beta driver (13.4 in May was the last official driver that he was using...c'mon AMD). Oddly enough, games haven't been posing any stability issues.
The same day he installed the 13.10 he started having freezes at other times as well (usually while web browsing). When the computer froze, he could move the mouse, but couldnt click anything. After a few seconds the keyboard would stop working as well. When he was fast enough to ctrl-alt-del, instead of getting the task manager, he got a message saying something like "preparing security options." He let it go and got another BSOD and then a "7a" error code (KERNEL_DATA_INPAGE_ERROR). This happened frequently in the past couple days, the computer would only run for about 10 minutes before this happened. During this time, a couple of the reboots generated the previous "could not find boot device" message after BIOS posted, but sometimes it restarted fine. He looked up the error code and ran system file checker (sfc.exe) in cmd prompt. It came up with a few errors and reported that it fixed them. He then ran secpol.msc and cleared virtual memory on shutdown. That was last night and it had been working for a couple hours without issue. I'm not convinced the problems are solved yet though.
Main: i5-3570K, ASRock Z77 Pro4-M, MSI RX480 8G, 500GB Crucial BX100, 2 TB Samsung EcoGreen F4, 16GB 1600MHz G.Skill @1.25V, EVGA 550-G2, Silverstone PS07B
HTPC: A8-5600K, MSI FM2-A75IA-E53, 4TB Seagate SSHD, 8GB 1866MHz G.Skill, Crosley D-25 Case Mod