Hardware issue.
Open the event viewer & look for what caused the crash.
Hmm, when I go into event viewer there's a million things and I don't know what one is my problem O_o
and in a corner of my screen (I've had this for a while) I see a color change, like if my screen shows red it'll turn into a red orange.
Also I think it might be the GPU, though when I start up my computer the longest it now can go is 20-30 minutes. Oh and also I've had my computer for 7 years and never opened it up.