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Computer turns back on after shut off

Last response: in Systems
February 16, 2013 3:47:43 AM

I recently built a computer and it worked great and still does. However, lately it has been turning itself back on about 15 seconds after I shut it down. If I shut it down from the choose user page then it will stay off, but if i shut it off from a logged on profile it will come back on. Dxdiag detects no problems, and as far as I can tell no plug ins are loose. This occurs with pressing the physical power button on the case as well as going into the start menu and clicking shut off.

my computer:
Windows 7
intel i5 3570k
asus p8 z77 v pro
mushkin 1333 ram 2 x4gb
cm 700w silent pro psu
samsung 840 250gb ssd
asus dvd burner
(buying a gpu this weekend most likely a 7950)

Any help would be greatly appreciated!
a b B Homebuilt system
February 16, 2013 4:25:51 AM

Run a command in administrative mode under dos,
c:>sfc /scannow

Then try shutting down after it has completed it's process of scanning and replacing all bad/corrupt systems files.
If it works your problem is solved.
If not
you'll need to enter the registry and force shutdown. A problem experienced under windows XP a lot.

Here is the reg key you'd need to change.

In the right pane choose AutoReboot/Right Click/Modify. Change value to 0 to disable and 1 to enable

February 18, 2013 9:47:28 PM

I can't find c:>sfc /scannow anywhere, sorry for late response I was out for the weekend
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a b B Homebuilt system
February 19, 2013 9:18:07 AM

You don't need to find it
Just open the Command Prompt Window (Dos Console from Start Menu-- All Programs---Accessories---Command Prompt--->Right click on it and run with Administrative Rights.)
The Dos Window will open
Then you just need to type that into the Window at Command Prompt.
February 20, 2013 12:23:00 AM

Alright thank you for help, I typed in the command however when i pressed enter, nothing happened. I shut down my computer after waiting about 5mins and it still restarted. So after that I modified value to 0 and it yet again restarted :/ 

Best solution

a b B Homebuilt system
March 5, 2013 6:19:45 AM

Check in the BIOS option and see if in the power settings you have restart system after power loss YES.
If so , turn it to No.
March 5, 2013 9:58:16 PM

Best answer selected by mtrotchie.