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Windows 7: Shutdowned computer boots up during night

13 Jul 2015   #1

Windows 7 Professional 64 bit
Shutdowned computer boots up during night

my computer even when shut down boots up during night. Any help to prevent it?

My System SpecsSystem Spec
13 Jul 2015   #2

W7 Pro x64 SP1 | W10 Pro IP x64 | W8.1 Pro x64 VM | Linux Mint VM

Turn the power switch off on the power supply or at the wall.

Are you sure the PC is shutdown and not sleeping or hibernating? Considering the power switch needs to physically make contact to power up that sounds strange.
My System SpecsSystem Spec
13 Jul 2015   #3

W7 Pro SP1 64bit

Check BIOS power settings:
HP Support document - HP Support Center

Your BIOS screens might not look like those shown in that article.
My System SpecsSystem Spec

13 Jul 2015   #4

Microsoft Windows 7 Ultimate 64-bits 7601 Multiprocessor Free Service Pack 1

What about a wake up call by mousegesture or scanner, whatever?
Look also in the bios.
My System SpecsSystem Spec
13 Jul 2015   #5

Windows 7 Professional 64 bit

Thank you for pointing to the right direction.
In BIOS, I found the "S5 Maximum Power saving", turned it "Disabled",
and now my computer should always require pushing the power-button to
start it -no wake-ups any more from any source.
Thank you.
My System SpecsSystem Spec
13 Jul 2015   #6
Layback Bear

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

A faulty switch or connector on the computer case/tower can cause this problem.
All the switch does is for a split second short the motherboard to ground at that connector/circuit.
It doesn't take much. A little crud or corrosion can cause problems.
My System SpecsSystem Spec

 Shutdowned computer boots up during night

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