Saturday, December 25, 2010

How to solve “My PC Randomly Wakes up from Sleep”

Whenever your PC wakes up, Windows keeps a log of why. To view, open a command line and run:

 C:\> powercfg -lastwake
Wake History Count - 1
Wake History [0]
  Wake Source Count - 1
  Wake Source [0]
    Type: Wake Timer
    Owner: [PROCESS] \Device\HarddiskVolume3\Windows\System32\services.exe
    Owner Supplied Reason: Windows will execute '\Microsoft\Windows\Media Center\mcupdate_scheduled' scheduled task that requested waking the computer.

As you can see, my computer woke up because of a scheduled task. Open the Task Scheduler: image And navigate to the task in question (\Microsoft\Windows\Media Center\mcupdate_scheduled, in my case). On the Conditions tab, uncheck wake: image


S. Bridge said...

Hi There,
Your issue above is exactly the same one I have.. however the task is never listed in the Task Scheduler... any idea what to do next? Would appreciate it :D

Travis said...

Please post the output of powercfg -lastwake; maybe there's another way other than Task Scheduler to wake the PC.