Find which device woke up Windows

Is i possible to find out (in event log?) which device woke computer from sleep?

I am having some problems with computer waking by itself, and trying to solve it.
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Does not have to be a device, could be a scheduled task as well. Please look into the system event log to find out about the time and cause.
mrmutAuthor Commented:
OK, but seek for what? There is a myriad of records, and I couldn't find the appropriate event ids.
For the first few events after it woke up.
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Benjamin VoglarIT ProCommented:
It is your Network Card. I had two computers with the same issue and always ware the network card.

Power Mgmt - Advance Power options - wake from lan (disable)

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Gerwin Jansen, EE MVETopic Advisor Commented:
If your computer is awake in the morning, chances are that it is caused by the Windows Update process. Updates can get installed at 3AM and a that (scheduled) task will wake your computer.
mrmutAuthor Commented:
OK. I will try turning off wake switches on LAN card and also Wake timers, and get back!
Did you do as I suggested? That would help us advance.
mrmutAuthor Commented:
Yes I did!, and it works :-)

mrmutAuthor Commented:
It was the LAN card!
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Windows 7

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