Computer crashed randomly?

Zenstoren

Honorable
Jul 6, 2012
24
0
10,510
I was on youtube just watching a video as you do, and my computer crashed, but the green light on the motherboard was still on. I tried turning it back on immediately and wouldn't, so I went downstairs to see if a fuse tripped. Well it didn't, and I came back upstairs, turned it on at it's now working fine.

Any ideas? It definitely wasn't overheating because I turned it on when I woke up in the morning.