Every so often, when I switch my computer on, it almost immediately switches itself off again. No error message; the monitor doesn't even have a chance to respond. After a couple of seconds it comes back on, then switches off, then comes back on again. On the third attempt, it stays on a bit longer, but still switches off shortly afterwards. Fourth time, the thing finally works, and I get a message:
"System has been restored to its default values.
The previous overclock settings have failed. System has been restored to its default values.
Press F1 to run setup.
Press F2 to load default settings and run setup."
I pick the second option. Everything works fine for a while, I can boot up as normal for a few days to a week, and then it happens again. I usually put my computer in sleep mode rather than shutting it down, but either way the same thing happens eventually.
I've never tried to overclock. I've not touched anything in the BIOS since I built the machine back in March. It ran fine until recently.
System specs: Windows 7 Ultimate SP1, 64-bit.
Processor: Intel i5 3570.
Motherboard: MSI H77MA-G43
Graphics Card: AMD Radeon HD 7750.
Power Supply: 700W.
Hard Drive: Hitachi HDT72101.
Memory: Kingston 8GB DDR3 1333MHZ.