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XP Home - Restarts After Shutdown

Posted on 2007-03-29
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Last Modified: 2010-03-05
I have a newish pc running xp home sp2 which when it is shutdown keeps restarting. It turns off ok but then after about 10 seconds just starts up again..

Is there some setting I can check or any other ideas as to what is causing this??

dc
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Question by:dercoss
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by:fpthree
ID: 18815206
LOL -
Sorry, I've encountered this problem as well.
Is this a Self Built Unit?
If so, what kind of Case and Power supply do you have?
Also, mother board.
Typically, I found that the issue is typical to the Case and Power supply.
I've replaced the case and power supply which then the problem went away.
Something to do with the Power Switch Relay and the power supply sending a signal to the MB.
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by:fpthree
ID: 18815216
It could be Wake on Lan settings in the BIOS.
If you want to try something prior to replacement, you may want to disable wake on lan in the BIOS.
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by:fpthree
ID: 18815222
If that helps, I would recommend visiting the Mother Board manufactures website and download the latest bios. Even if it's a retail bought PC, it's a good practice to visit the vendors website and update and software they recommend necessary.
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by:KCTS
ID: 18815300
The reason it is probably restarting is that an error is occuring in the final stages of shutdown and your system is set to reboot on an error.

Right Click on My Computer, Select Properties and Go to Advanced. On 'Startup and Recovery' Select Settings.  Untick the 'Automatically Restart' checkbox.

If an error occurs now in the shtudown sequence you will at least be able to see it and troubleshoot.
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by:fpthree
ID: 18816259
I believe by default this is not checked, so unless you've changed it to restart upon an unexpected error - such as a blue screen or a system driver failure (video drivers are common for this). There's no need to visit KCT's post.
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by:dercoss
ID: 18816398
The automatic restart option is unticked. I've tried re-ticking it restarting and unticking again without success.
I've also checked the bios settings and nothing there makes any difference. The machine also seems to have the latest update. As to replacing the case or power supply, the owner doesn't want to go to all that trouble.

The only clue I have is that the machine was moved to a new house about a month ago and the problem only appeared  after that. I am guessing that maybe a knock to the case is causing the on button to be partially stuck, although it doesn't look damaged or dislodged in any way..

I have found a solution by pressing the button for a few seconds when the pc restarts which turns it off properly and this seems to satisfy the owner..

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by:fpthree
ID: 18816466
Yeah -
That's relations to the relay switch. That's the common (workaround) for the issue you're experiencing.
If that's a solution that the owner is willing to live with. Then I would say your problem is no longer.
But if it becomes something that the owner want's to resolve entirely.
Then I would start by replacing the case & power supply.
It's possible that the case or power supply was surged during re-setup, or the relay just happy to go out at that time specifically.
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by:fpthree
ID: 18912649
Oddly enough I have a friend with the same issue.. Unfortunately, my own solution was not effective. I'm looking into the OS or other hardware related issues. Something is sending a signal to boot the machine back up. I'm guessing it's wake on lan or something along those lines...
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by:fpthree
ID: 18921870
Well I found the issue, and a resolve for it.
After having the same issue as reported here in the db, i've come to a conclusion that most likely Windows update installed a network driver which is or will cause the computer to restart after a shutdown command. To confirm that it was the LAN driver, I entered the bios and disabled the onboard network interface. I started the computer, checked with the device manager and noticed there was no nic available. I then issued a shutdown from start > shutdown.
I left and ate some pizza, came back and the machine was still off.
Next, I visited the manufacture (motherboard) website and downloaded the latest drivers.
I suppose you could roll back the drivers that were originally installed, but I've thought about this after the fact. I installed the new NIC drivers and the problem was solved. The machine shut down with no 'phantom' restart. So, if you want to try this - it's a recommended solution for the PC that wont stay shut down.
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