When I turn my computer on I am able to boot to windows but if I try to boot the bios the computer doesn't cycle power but restarts as soon as I press delete to access bios burring boot. I have done some mild overclocking (4.2ghz 1.230v i7 2600k) my motherboard is a MSI p67 gd55. I have accessed the bios several times at these clocks before and it is stable for a few hours of prime 95 stress test. Any ideas why I cant get to my bios?