For the past couple of weeks, my system has been doing a blue-screen-of-death/reboot crash at sort of random times, but it's getting more frequent, something like every 2-3 days.
Thankfully FireFox, Chrome, Opera, and Open Office all have good auto back-up so when I re-open them, I pretty much have what I had open at the time of the crash (except for Twitter, which doesn't save the "timelines" that I might have open waiting to read), but I've been getting very paranoid about saving the stuff I have open in, say, NotePad, as I've lost a lot of work that way.
What's weird is that the crashes seem so unpredictable. I was away from the computer (having lunch or something) the other day and came back to find it up at the "select user" screen. I just tonight had it crash in the middle of writing a Tweet. There's no apparent pattern to how/why it's crashing, except for that when it's happened when I've been here it briefly goes to the blue screen with large white text (never up long enough for me to read it).
(sigh) ... I haven't be running anything out of the ordinary for me, and tonight I didn't even have a boatload of tabs open (I almost always have 3 browsers running, FireFox, Chrome, and Opera, and frequently have as many as 60 tabs going in one of 3 FireFox windows). I don't even know where to start to check what might be causing this. :-(