Right-click a device that was waking the computer > click Properties.

Press Windows Key+X > Click Device Manager.

How To Disable Devices That Are Waking The Computer?

Type powercfg.exe /devicequery wake_armed > press Enter.

Type powercfg.exe /requests > press Enter.

Press Windows Key+X > Click Command Prompt (Admin).

You may find a reason for the Sleep problem here.

Open energy-report using a web browser to see the report.

Now go to your computer’s Windows folder and open the System32 folder.

Type powercfg.exe /energy > press Enter.

Press Windows Key+X > Click Command Prompt (Admin).

Troubleshooting Windows 8.1 Sleep Mode Problems

Click the + sign next to Power buttons and lid, here you can change the settings to Sleep for whichever action you want.

Type power options > select Power Options from the list.

Press Windows Key+W to open Settings Search.

The first place where you should look for the Sleep setting is in Power Options: You can also install utility software to find, download, and install the driverfor you.

Once installed, this should enable you to use the sleep function. If you upgraded your laptop to Windows 8.1 and the sleep function stopped working then you should check your laptop manufacturer’s website for a Windows 8 version of their laptop’s utility software or driver. Most people are accustomed to using the sleep function on their laptop’s keyboard to put the computer to sleep. They can’t get their computer (usually a laptop) to enter sleep mode. Wally’s Answer: This is a common complaint from people who upgrade to Windows 8.1 from Windows 7 and other Windows operating systems. Setting up weekly (or daily) automatic scans will help prevent system problems and keep your PC running fast and trouble-free.

Step 3 : Click “Repair All” to fix all issues.

Step 2 : Click “Start Scan” to find Windows registry issues that could be causing PC problems.

Step 1 : Download PC Repair & Optimizer Tool (WinThruster for Win 10, 8, 7, Vista, XP and 2000 – Microsoft Gold Certified).

Before addressing any computer issue, I always recommend scanning and repairing any underlying problems affecting your PC health and performance:

Change sleep mode windows 8