While in Extended Desktop display mode, if the HDMI cable is unplugged, you may not be able to open the driver’s Graphics Properties window.
This issue is resolved with the latest graphics driver.
To check whether a newer graphics driver is available for your graphics controller, use the Intel® Driver Update Utility.
If the online utility displays a message that a customized graphics driver is detected, click here for additional information.
How to open the Intel® Graphics Properties window