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Windows 7: Computer Starts Up On It's Own

12 Dec 2015   #1
beachbuoy

Win 7 64-bit
 
 
Computer Starts Up On It's Own

My Win7 64-bit PC, built on a Gigabyte P55A mainboard, starts up all by itself. Not every time I shut it off. But, maybe 30-40 percent of the time, I will shut it down for the night and, if I don't flip the power supply off, the computer will start up sometime during the night and be running when I walk into the office in the (home) office. Once, I caught it in action. I came back to the computer about 30 minutes after shutting down Windows and it started booting back up as I was walking into the room.

Possibly related, if I put the PC into Sleep mode, I will come back later to find a blank screen with only the cursor blinking in the upper left corner of the screen, apparently failing to "Resume." I say apparently, because the only way to get Windows back up is to kill the power and reboot. Upon rebooting, it stops at the boot option screen asking if I want to wipe the resume info and start fresh or not. If I don't wipe and start fresh, it goes back to the blinking cursor and a blank screen.

I don't even know where to start in looking for an answer to this puzzle. Any ideas?


My System SpecsSystem Spec
.
13 Dec 2015   #2
bigmck

Windows 7 Home Premium 32-Bit - Build 7600 SP1
 
 

Quote   Quote: Originally Posted by beachbuoy View Post
My Win7 64-bit PC, built on a Gigabyte P55A mainboard, starts up all by itself. Not every time I shut it off. But, maybe 30-40 percent of the time, I will shut it down for the night and, if I don't flip the power supply off, the computer will start up sometime during the night and be running when I walk into the office in the (home) office. Once, I caught it in action. I came back to the computer about 30 minutes after shutting down Windows and it started booting back up as I was walking into the room.

Possibly related, if I put the PC into Sleep mode, I will come back later to find a blank screen with only the cursor blinking in the upper left corner of the screen, apparently failing to "Resume." I say apparently, because the only way to get Windows back up is to kill the power and reboot. Upon rebooting, it stops at the boot option screen asking if I want to wipe the resume info and start fresh or not. If I don't wipe and start fresh, it goes back to the blinking cursor and a blank screen.

I don't even know where to start in looking for an answer to this puzzle. Any ideas?
This indeed is rather strange. The most logical thing would be that your house is haunted , no just kidding. == I googled "windows 7 pc starts unexpectedly" and surprisingly there are a lot of links. One of them should be your problem. Sorry I did not have anything more specific.
My System SpecsSystem Spec
13 Dec 2015   #3
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

If the PC is in sleep mode, it can restart from an external interrupt it is getting - unless you have ruled that out with your settings.

If the power is off, it should not be able to restart.
My System SpecsSystem Spec
.

13 Dec 2015   #4
DavidE

Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64
 
 

In BIOS settings check if you have Wake On LAN (WOL) enabled.
If you do, disable it, and see if that helps.
My System SpecsSystem Spec
18 Dec 2015   #5
beachbuoy

Win 7 64-bit
 
 

Thank you for the suggestions, guys. Wake on LAN was not enabled, but, there were a surprising number of other wake-up options, including some that could possibley be triggered by a misbehaving power supply. So, I disable those and will see how things go from here.

Who's awesome? YOU ARE, SevenForums.com!
My System SpecsSystem Spec
18 Dec 2015   #6
rvcjew

7 Pro x64, 10 Pro x64
 
 

If you get it again after it starts up go to an admin command prompt and put "powercfg lastwake". It will tell you what did it if it can tell.
Lastwake Command
My System SpecsSystem Spec
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 Computer Starts Up On It's Own




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