Windows 8.1 - Prevent calls from waking up your screen
An incoming call (e.g Skype) will automatically bring your Windows 8.1 from Sleep mode. To prevent calls from waking up your screen, follow the below procedure:
- From the Start Screen, press Windows Key + C to display the Charms bar.
- Go to Settings > Change PC settings.
- Go to Search and apps > Notifications.
- Toggle "Turn on my screen when I get a call" switch to "Off".