A "funny" thing happened here this morning with my desktop computer.
I was having a bit of a play around with the speed controller program for the CPU fan, that came with my mother-board.
I'm not sure what I did, but for some reason, the CPU fan stalled, meanwhile the computers buzzer was letting off a raucous beeping sound, the screen froze and I ended up rebooting.
Once I restarted, it returned to normal, fan was running at it's usual speed.
I won't be mucking around with that program again, even though I hadn't changed the temperature or fan speed settings that much, at least not enough to bring on a thing like that.
What I did find later on, on the Net was a program called SpeedFan, it monitors all you fans speeds, system voltages and temperatures and it's free.
It can be found HERE
You can buy it too, which means you can do a few other things apart from what the free version does already, but the free version is all I'll ever need.
What I did notice was in the voltages readout, is my +12V is down as far as 8.58V and the -12V is up at -16.97V, is this normal for the voltages to that far out of wack?