Computer having somewhat random shutoffs.

[Carter2001]

My computer will sometimes be turned off when I wake up in the morning, but not always. Today I wasn't home for a few hours, and my PC was shut off again. What really worried me is this time when I turned it on, it started up for a couple seconds, shut off, then turned back on and booted to Windows

 

[lifespill]

System specs?

 

[Carter2001]

http://pcpartpicker.com/list/8kBZJV