I'm having some strange issues with Windows 8 Pro and it's sleep settings. My desktop will randomly wake itself up and not go back to sleep so I come into the office in the morning and it's been running for I don't know how long. It will go to sleep for at least an hour before waking itself back up. How to adjust power and sleep settings To adjust power and sleep settings in Windows 10, go to Start, and select Settings System Power & sleep. For more power saving options, select Additional power settings to change how your device uses power. How to Change the Setting for the Sleep Timer in Windows 8 and Windows 8.1. The sleep mode is designed to save energy and battery life when you are away from your computer for a short time.

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2. Windows 8 Sleep Settings Not Working

Description: This is an overview showing you how to permanently disable sleep mode in Windows 8.

1. Open the advanced options in Windows 8 by holding the Windows key on your keyboard and the letter X. Select the RUN option.
   
2. In RUN type GPEDIT.MSC and click OK.
   
3. In the Local Group Policy Editor, go to Computer Configuration > Administrative Templates > System > Power Management > Sleep settings.
   
4. Now in sleep settings find the Allow applications to prevent automatic sleep (plugged in) if you have a desktop computer. Then go to Edit policy setting. If you have a laptop you will repeat the below steps for the plugged in and battery settings.
   
5. Now click the Enabled button, then click Apply and OK.
   
6. Now find the Turn on the ability for applications to prevent sleep transition field, go to Edit policy setting, then select Enabled and then Apply and OK.
   
7. Next we need to close the group policy editor, hold down the Windows key and the letter X as we did in the beginning and open Run. Then type REGEDIT into the run field and click OK.
   
8. Once in the registry editor we need to navigate to HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlPower.
   
9. Inside the power folder click on HibernatedEnabled to edit the field. Change the value from 1 to 0 and click OK. Do the same for the HiberfileSizePercent field as well.
   

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Windows 8 Sleep Settings Not Working

Congratulations, you have successfully configured your Windows 8 computer to never go to sleep.