Hi Robert,
Thank you for posting your question in Microsoft Community.
From your issue description, I understand that Windows 8 returning to sleep mode, after resuming from sleep mode. Please let me know if you are not facing this issue.
I can understand the inconvenience caused to you. I will help you resolve the issue!
Before we proceed with troubleshooting, I need to ask few questions.
- Have you made any recent changes to the computer prior to this issue?
Try the methods and check after each method:
Method 1: Run Power Troubleshooter:
a) Press the ‘Windows + W’ key on the keyboard.
b) Type troubleshooter in the search box and then press Enter.
c) Click “Find and fix problems” option from the list appeared in the left side.
d) Click System and Security and Run the Power Troubleshooter.
Method 2: “Restore Power Settings to Default”:
a) Press ‘Windows + R’ keys. In the
Run window, type ‘Control’ and then press Enter key.
b) In the Control Panel (All Items View), click on the
Power Options icon.
c) Click on the Change plan settings link, located to the right of the power plan that you want to restore the default settings for.
d) Click on the Restore default settings for this plan link.
e) Click on the Change advanced power settings link.
f) Click on the Restore plan defaults button.
g) Click on Yes to confirm.
h) Close the Edit Plan Settings window.
If the issue persists, post your reply with results and questions asked as above. We are happy to assist you further with advanced troubleshooting steps!
Hope it helps.