Originally Posted by terry74728

I have a strange problem that I have posted to a forum before, but could never get a satisfactory solution. I built a new computer last February and everything works fine except the computer will shut down at the Windows loading screen when the ambient room temp. is around 70 F. or below. It posts just fine, and will usually boot all the way up on the second attempt to boot. Once it has booted completely up there are no problems and I can shut down and re-start normally as long as the computer hasn't been sitting a long time and hasn't cooled down to below around 70 F. During warmer weather it will boot up on the first try, but since the weather is getting cooler now, it has started shutting down at the start-up screen when cold again. I want to point out also that it shuts off at the exact same time during the Windows loading screen. I can start the computer in safe mode or go into the bios and it will continue to run with no problem...it seems that the extra time that the computer is running at the safe mode option screen or bios is enough to warm up the computer and will start up ok when I choose to start Windows normally. I have tried a different power supply with the same results. Here are my computer specs:

AMD 64 X2 5200+
Gigabyte GA-M55SLI-S4 motherboard
Sapphire X1650XT video card
Theramaltake 430 watt power supply
G. Skill F2-6400CL4S-1GBHK RAM (2 gb.)
Western Digital WD2500KS hard drive
Samsung SH-S182M dvd/cd burner
Thermaltake VB1000BNS case

Any ideas or solutions will be greatly appreciated.