After applying a Microsoft IE 11 update (KB4012204), the Remote Control connection screen hangs on loading and the following message is displayed: To increase your connection speed, click the color depth button... and only about 3 inches of the screen is displayed.

The IE 11 version with the issue is the one below:

Microsoft IE update KB4012204 is causing the issue.
Please review the following for more information:
WORKAROUND:
Via Remote Control select Menu, then Full Screen.

RESOLUTIONS:
For Windows 10:
If using a Windows 10 machine to remote the machines:
Applying the Microsoft KB4016635 will fix the Expert Assist Remote Control screen issue.
Windows 10 KB4016635 is available only as a stand-alone package from the Microsoft Update Catalog website. Microsoft is not currently aware of any issues with this update.
For Windows 7:
If using a Windows 7 machine to remote the machines:
Applying the Microsoft KB4016446 will fix the Expert Assist Remote Control screen issue.
Windows 7 KB4016446 is available as a stand-alone package from the Microsoft Update Catalog website.