How to check why Windows keeps waking itself up?

[Harry Voyager]

I know there's a way to do it, but I can't for the life of me remember. 

 

Basically my desktop keeps waking itself up out of sleep mode, and I'm not sure why. I know some of the time it's probably doing various updates and not going back to sleep, and sometime waking up input peripherals that just keep providing constant inputs. 

 

I recall there was a way to check the logs to see what caused it, but can't recall how. 

 

Thank you, 

 

Harry Voyager

[Helpful Tech Witch]

check event viewer

[da na]

Have you turned off Fast Startup? That often fixes that kind of issue

[GuiltySpark_]

1. Search for Command Prompt in the Start menu.
2. Right-click and press "Run as administrator".
3. Run the following command: powercfg -lastwake.

[Harry Voyager]

@GuiltySpark_ Thank you. Found the first one: HP Print Doctor was periodically waking the system to do whatever. 

 

Now let's see what other things are running random stupid in the background...