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My wife's computer with Windows 10 won't honor the screen timeout settings in Settings/Power and Sleep. Specifically, what happens is that the screen blanks for less than a second and then the screen comes back on. (And yes, the system won't sleep, either.)

If I explicitly tell the computer to sleep, it goes to sleep as expected.

I've checked the usual settings issues, and I've come to the tentative conclusion that one of the apps she's running is vetoing the sleep request.

Any ideas on how to figure out which app is causing this behavior?

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  • Can you put the machine to Sleep manually?
    – Ramhound
    May 19 at 17:59
  • @Ramhound yes, I can put the machine to sleep manually. But my wife and I want the machine to turn the screen off and go to sleep automatically, and it doesn't do that.
    – Eric Brown
    May 19 at 20:02
  • I understand you want the machine to go to sleep automatically. If you are able to put the machine to sleep manually that means there isn't an application that is preventing the machine from automatically going to sleep. This means the machine is never attempting to go into that sleep state. I have some additional thoughts, but don't have access to my notes, I will be asking for more information shortly.
    – Ramhound
    May 19 at 22:58
  • Related but not a dupe - superuser.com/questions/1576236/… Higher rep users may be able to check if the deleted answers would be appropriate here [idk Win well enough to decide]. Empirically, things like radio stations & youtube will keep awake.
    – Tetsujin
    May 20 at 6:27
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Go to Settings > System > Power & sleep and look up on the settings.

Windows 10 default settings: enter image description here

Change your settings like this.

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  • As I said in the original message, I've checked those settings. The machine isn't honoring those settings.
    – Eric Brown
    May 19 at 20:00

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