Problem with booting??

187Flatliner

Honorable
Jan 28, 2014
387
0
10,810
Asrock z77
intel 4670k
windows 7

i can get other specs if you need them.

The other day my brother went to use the computer and it booted straight into bios..... he didnt change a thing....hit exit and it looped restarted straight back into bios. I was gone for the weekend.....he saved a screen shot cuz he didnt know what the bios was. i double and triple checked with him to make sure he had changed no settings of any kind.

Anyways when i got home i booted it up and it booted normally, he couldnt use the computer for 2 whole days cuz it wouldnt boot straight into windows.

it works fine so im not sure whats going on....ideas?