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Random Reboot to BIOS -- No BSOD
Have benefited from reading many great posts on this forum, but can't yet find quite what I need.
Windows 7 Home Premium 64-bit has been running fine for six months, but has begun rebooting to BIOS after about half an hour. Restarting from BIOS doesn't seem to work -- have to power off and back on to return to Windows.
When problem occurs, Windows becomes sluggish for about a minute ... programs and start menu slow/non-responsive ... then restart.
- No known changes have been made to the system.
- No overclocking. Temps OK. Corsair TX850 PSU
- No programs need to be opened for it to happen.
- Tends to happen about half an hour after startup.
- Windows Updates current.
- Microsoft Security Essentials virus protection in place.
- Updated BIOS, but didn't fix the problem.
- 8 Passes of MemTest+ 4.20 completed without error.
- No problem if boot into CD-based OS such as MemTest or Linux LiveCD.
I've been struggling to learn about dump files, and I'm starting to think that this event just isn't creating them because I can't find them even though I'm pretty sure they're enabled. C drive is on an SSD. Maybe that disables dump files?
Thanks!