Windows 10: My PC no longer puts itself to sleep after sitting idle. How do I fix this?

My PC previously would turn itself to sleep when idle for 1 hour, but has stopped doing that, despite not altering settings. Under Settings > Power & Sleep, my settings remain set to 1 hour to sleep, but this hasn't been occurring for the past few weeks.

:)

 

Trouble Putting PC to Sleep  

I finally determined what the cause of my PC waking up right after I invoke sleep function Start > Power > Sleep. I recently purchased a Velocifire wireless (2.4ghz) keyboard that also comes with a USB cord so it can be used in corded mode. When used in corded mode, sleeping the PC is not a problem. When I use the wireless dongle, the PC refuses to sleep for more than a second. So, the wireless mode of this keyboard is what triggers the problem. In addition to the things I've tried in my original post, here are the results of some suggestions you guys made:

• Created a new fake user and logged in under than user. Same behavior.
• Started PC in Safe Mode. Unfortunately, in Safe Mode sleep functions are limited to the monitor and hard drives. Nothing to put the PC to sleep.
• Tried going into sleep via Alt + F4. Same behavior.
• powercfg -a reports S3 is active on my system.

There are no obvious irregularities in Device Manager. The dongle shows up under USB Serial Bus Controllers as a USB Composite Device.

• General Tab says "This device is working properly".
• In Driver Tab, I tried searching for a better driver, but Windows says there is no better driver.
• There is no Power Management tab.

So as it turns out, all of things I've tried appear to have been a waste of time as it was not addressing the wireless function of the keyboard. I contacted the manufacturer and they suggested that I delete the USB Composite Device entry, re-boot and re-insert the dongle. However, that did not change inability to sleep the PC.

Any other ideas?

 

Bluetooth still on while idle

Thanks for following the steps. Now, the settings won't take effect if you are only using normal PC idle mode. Normal functionality of Bluetooth and Wi-Fi settings are to stay connected even if PC is idle. With the settings that you have created, we would
suggest that you set your PC to automatically go to Sleep or
Hibernate once idle. In this way, the settings "Allow the computer to turn off this device to save power" should take effect.

To set your PC to automatically go to Sleep or Hibernate when idle, please follow these steps:

• Open Control Panel, set view by: Small
  icons.
• Look for Power Options.
• Click on Change when the computer sleeps on the left pane.
• Set a timer.

Please try it out. Hope it helps. If you have any other concerns, don't hesitate to come back to us.

 

Computer is unresponsive after sitting idle

My laptop screen goes black after sitting idle or when i close the lid. Sleep and hibernation are disabled but laptop becomes unresponsive.