Unexplained computer glitches. Stepped away from my PC for a few minutes this evening, came back to a DOS-like screen saying my boot drive was inaccessible. Powered it down, rebooted just fine, checked out a few things, everything seemed good.
Left my PC on, popped in and out of my room a few times, then a couple of hours later, came back to find my background pic displayed, no icons shown, mouse frozen. Powered the sonofabitch down, opened the case, reseated some connections, vacuumed out the dust, ran a scandisk of the boot drive, ran Windows memory diagnostic, ran the Windows startup repair utility, checked for viruses, malware, etc.... all good, no problems found. Crap like this makes me suspicious. Hoping it was just a fluke, and that my SSD doesn't have some deeper issue, planning to run a more detailed scandisk later.