Computer boots and freezes a few minutes after loading

Someone please help me ive had this problem now for about a week and a half, I literally log in and the computer starts up as usual, few minutes down the line and everything except the mouse then about a minute later the mouse freezes as well forcing me to have to power id down manually.

Strangely enough this issue doesn't occur in safe mode or safe mode with networking.

PLEASE PLEASE HELP ME I'M SUFFERING.
(I need to play the bf4 open beta!!!)
 
"Strangely enough this issue doesn't occur in safe mode or safe mode with networking"... because in Safe Mode only basic drivers are used. This may be a memory issue or caused by a failing power supply
 
Surely the issue is then with one of the drivers that don't turn on in safe mode, I've tried updating but they don't work in safe mode, and I don't have enough time to update them if I start the computer in its normal mods
 
When I say I dont have time I mean the computer freezes before I can't even scan for outdated/failing drivers before it freezes on me
 
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