PC turns off with no BSOD.

[evanz]

could be so many things, psu/ram/cpu/mb failings

go into safe mode, and boot, and wait for sometime, what happens?

does it reboot itself?

what are your system temps?

have you upgraded something late, gfx card, ram cpu?

if it reboots on "normal" system startup it could be a driver confliction

tried a system restore, although, i dont like doing those as most of the time, they dont fix, a lot of problems