Dusting my video card didn’t do anything to keep it from freezing apparently. It didn’t slow it down, and now it’s happening twice a day if my computer is on long enough. Usually the first is on login before I even load anything graphics intensive.
Windows once let me search for fixes to a problem, but it didn’t find anything and didn’t actually tell me anything about the problem so it wasn’t exactly helpful.
A quick search on google found a youtube video of (apparently) my exact problem. Looks like next time it happens I’ll be poking around in my power supply wires. I can’t remember if I have more of the type wire that goes to my video card than I used, but if that’s it hopefully switching cables will fix it.
It also sounds like the series my video card is in sometimes have an issue that sounds like this, and since I was strongly considering upgrading my video card sometime soon this might be more incentive for getting around to that.