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Windows 7: Computer reboots for no apparent reason

12 Jul 2015   #1

windows 7 pro X64
Computer reboots for no apparent reason

Please help me figure out why my computer is acting like it has a power blip the only error I have is Kernel-power, system rebooted without cleanly shutting down first. The computer is about four years old.
Intel(R)core(TM)i7cpu 960@3.20GHz
RAM 6.00GB
64bit operating sys
windows Home Premium service pack1
Motherboard Asus Sabertooth X58.
Sapphire Graphics Card PcI-E HD5600,ATI Radeon HD5670
2 Disk drives Sata ST310005
Power Supply Cool Master 600 RS-600-Pcar-E3
using Asus probe the voltages are fine, temperatures are ok and fans are working properly.

the computer will run various time before this happens one time 38 minutes, another time 26 minutes and it operates normally when it is running.

just need some pointers on how can I determine what is causing this.

hope I put this in the right section

Thanks for the fourm

My System SpecsSystem Spec
12 Jul 2015   #2
Layback Bear

Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64

Look in your Event Logs and see what was going on right before the computer shut off.

Also monitor your temps and see if possibly they went high.
My System SpecsSystem Spec
12 Jul 2015   #3

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1

Often we see this behavior (on systems that do not have the usual power or overheating problems) due to the case switch. They get old and start making contact without much provocation: just bumping the table or desk.

You can test to see if this is the case (pun intended) by disconnecting the case switch leads from the motherboard header.
You can use a flat screwdriver to momentarily connect the two case switch pins to turn the PC on (modern motherboards have a power button on the motherboard).
Run it for a while with the case switch lead disconnected and see if the condition goes away. If it does you will know the culprit: case switch.

Note: sometimes it can be just that the case switch connector is loose on the pins.
My System SpecsSystem Spec

12 Jul 2015   #4
Layback Bear

Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64

I have personally had the switch on the tower cause such a problem.

It can also be things like power supply, wall outlet, extension cords, surge protectors or any thing else the power supply get it's A/C power cause this problem.

zformer please put what power supply your system uses in your
My System Specs.
My System SpecsSystem Spec
13 Jul 2015   #5

windows 7 pro X64

Thanks for the suggestions everyone, my power supply is a Coolmaster 600 RS-600-Pcar-E3, and I have checked connections to make sure there are no loose ones, it is plugged to a ups which I have another computer powered from and have switched places just in case and the run time seems to be getting shorter it now runs about 6 minutes now almost seems like a motherboard component heating up and taking it out I will keep plugging along maybe when it fails completely I will figure it out.
My System SpecsSystem Spec

 Computer reboots for no apparent reason

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