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Windows XP Restarts on shutdown


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#1
RogerMortimer

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Windows XP Restarts when shutdown either by "START-TURN OFF COMPUTER" OR Button on computer.

When power is removed and restored does not automaticaally restart. Restart box is not ticked
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#2
Alzeimer

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This symptom I've seen before and it was due to a power supply that is defective causing the CMOS battery to short.

First thing is to replace the CMOS battery (This will help you shut down your PC normally for now but if your power supply is defective the battery will short again after a short period)

then you need to download and install CPUID Hardware Monitor to check the voltage of your power supply
http://www.cpuid.com.../hwmonitor.html
Download the free version 1.23 setup


Hope that helps
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#3
RogerMortimer

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Thanks for the suggestion.

I have changed the battery and checked that all voltages are OK BUT it still restarts a few seconds after it has completed a shutdown.

What next???

Roger Mortimer
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#4
Alzeimer

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OK so if your battery is new and your power supply voltage seems alright then it is either one of the two that may cause your PC to restart.

1- A driver is causing your computer to BSOD when shuting down and if you have your setting in Windows to restart when crashing it will then seem to shutdown (but it is crashing) and then it restarts. To check if this is the reason you should deactivate the AUTOMATIC RESTART in your settings. This way you will see next time you shutdown if you see a BSOD.
Go to Control Panel/System and Performance/System and under the tab Advanced choose Startup and Recovery and uncheck automatic restart

1- Your CMOS settings are wrong and sometimes doing a Clear CMOS by removing the battery (unplug your PC before doing that) and shorting the CMOS jumpers may help to solve your issue.

And as a last cause for your problem (unlikely but possible) is that your motherboard is defective and causing shorts but if your computer is not showing any other ill effects (usb ports not working or pci slots defective) then it is probably not your board.
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