Ever since I upgraded to the Windows 8.1 beta (and even now with the Windows 8.1 RTM), my computer will not idle to sleep. This wouldn't be that much of a problem since I almost always remember to put it to sleep before walking away. But sometimes the computer will wake on its own through a scheduled task, and then the computer will stay on until I return to it. (By the way, I'd rather not disable scheduled tasks from being able to wake the machine.)
The computer is set to sleep after 30 minutes of inactivity. I have set the Power Option "When sharing media" to "Allow the computer to sleep." I have deactivated all "wake_armed" devices so that
powercfg /devicequery wake_armed
returns
NONE
I have installed all the drivers Windows couldn't automatically detect (of which there was only my "Creative Game Port"). Finally, I have generated a report from
powercfg /energy duration 3600
Originally, it informed me of a few problems, such as the "When sharing media…" setting. As I said earlier, I have now set the "When sharing media" setting to "Allow the computer to sleep." Here is the report, which seems to suggest that I have no further serious problems:
https://skydrive.live.com/redir?resid=3D3292D8A7DEC2F4!17449&authkey=!AIllZ4c3A8_-XHU
SkyDrive will probably show the HTML upon clicking above. Try clicking Download and then opening the file. Thank you for your help.
Best Answer
The answer was to leave the Homegroup (which I wasn't using anyway)! I started a thread in the Neowin.net Forums, and thanks to Kool Box for figuring it out:
http://www.neowin.net/forum/topic/1176793-windows-81-wont-sleep-when-idle/