Please, perform the necessary updates and software tweaks
ADDITIONAL troubleshooting steps
After you follow the steps from the article, here are a couple of additional things you may also try :
Check Device Manager
1. Click on the Windows Start button, type and then open Device Manager 2. Locate System devices and expand the trail
3. Locate and right click on "Intel (R) Management Engine Interface" then select Properties 4. Select Power management tap 5. And uncheck "Allow the computer to turn off this device to save power" 6. Save it and close it.
Turn off Windows Fast Startup
Windows 8/10/11 start in a different way (compared to Windows XP, Vista or 7, for example) - the boot process has changed. Fast Start up is a "trick" to start/load your Windows faster. However, it may sometimes cause issues. Disabling Fast Start up in Windows 10 restores Windows to a slightly slower but classic more robust full start every-time you need to start your device.
Click on Windows Start button
Type control.exe and open Control Panel
Go to Power Options -> Choose what the power button does
Click on Change settings that are currently unavailable
Uncheck Turn on Fast Startup
Make sure you press Save changes button
Close the window
Uninstall 3rd party security products
If they are not developed correctly, they (their drivers) might prevent Windows from going into Sleep mode properly. I am personally aware of at least 2 antivirus programs which are "responsible" for the Sleep issues.
Go to Control Panel
Click on Programs and features
Uninstall any 3rd party security apps (firewalls, antivirus, encryption programs, internet security suites) which you may have.
Restart your Windows computer
Scan your computer for viruses/malware/unwanted apps
.... Download and run the free ESET Online Scanner (www.eset.com)
Scan your PC for viruses, threats and unwanted/unsafe applications - remove them if anything found.
Restart your Windows 10 computer
Try updating the BIOS/UEFI
Both UEFI and BIOS are low-level software/firmware that starts when you boot your PC before booting your operating system [Windows], but UEFI is a more modern solution. Sometimes, an update may resolve issues with the Sleep mode.