So I'm really out of my league when it comes to hardware issues, and google can't seem to help me.
My three year old Vista desktop intermittently has issues where it will randomly turn itself off. After this power-down it often seems to get caught in some sort of hang-up where it will beep once and then get frozen on the "DEL to enter setup / TAB to show BIOS POST message" without being able to access either option.
This often goes on for 30+ restarts, eventually it has always ended up booting up. This issue is seemingly intermittent, as well, as sometimes I have no issue shutting down/starting up. This doesn't just happen with the forced shutdown, either, as sometimes it refuses to boot after an intentional shutdown, as well. I'd estimate (though I have no idea) that it boots up no problem a majority of the time, with this issue being strangely chronic when it does show up.
I have no idea, whatsoever, what could be causing this. I'd even feel better if there was some sort of discernible pattern, but it almost always appears random. I have run every spyware/anti-virus I have to no luck, and am simply stumped.