Computer starts unexpectedly after shut down

[DLGolfs]

American Megatrends ver 1.21.12
AMBIOS

Here is the big clue.

The OP says "the keyboard does start up the computer", so that must
mean than his BIOS is set to start the computer again on keyboard
input.

I am guessing (since he has not responded which would help) that after
he shuts Windows down, the power supply is still running. This would
be necessary to restart on keyboard input.

Given that the BIOS supports starting the computer on keyboard input,
it probably also can be set to start at a certain time (like my friend
was set to 00:00) and this feature is probably enabled, but who know
what time. Other conditions could also cause a restart, like a tickle
on the Ethernet port from a router, hub, switch, wireless...

If you can't figure it out by looking at the BIOS, tell us the BIOS
vendor, version, etc. and we can help you look through and interpret
the sometimes vague settings.

If you by a voltmeter, send it to me. You will not need it for this
problem.

 

[DLGolfs]

AMBIOS American Megatrends Version 1.21.12

Here is the big clue.

The OP says "the keyboard does start up the computer", so that must
mean than his BIOS is set to start the computer again on keyboard
input.

I am guessing (since he has not responded which would help) that after
he shuts Windows down, the power supply is still running. This would
be necessary to restart on keyboard input.

Given that the BIOS supports starting the computer on keyboard input,
it probably also can be set to start at a certain time (like my friend
was set to 00:00) and this feature is probably enabled, but who know
what time. Other conditions could also cause a restart, like a tickle
on the Ethernet port from a router, hub, switch, wireless...

If you can't figure it out by looking at the BIOS, tell us the BIOS
vendor, version, etc. and we can help you look through and interpret
the sometimes vague settings.

If you by a voltmeter, send it to me. You will not need it for this
problem.

 

[Jose]

American Megatrends  ver 1.21.12
AMBIOS

Did the problem go away when you put your original keyboard back?

If you only have the issue with the wireless keyboard (of still
unknown manufacturer) that doesn't necessarily mean you can't use your
wireless keyboard.

The answer will eliminate one variable in this complicated equation of
unknowns.

The process of elimination.