Consider the following scenario:
You have a Winows 7 computer with multiple monitors (2 display devices) connected to your PC with very different capabilities, or each is running in different resolutions while in duplicate (clone) mode so you can see the same desktop on both displays.
If one of the displays doesn’t support interlaced(1080i) resolution but the other does, it is possible that if an application (like a Video player) is launched, it will be unable to make a change to the desktop resolution and enable content protection.
As a result of this the application might not behave correctly or in the case of a Video player, the playback may not be enabled and you may see the following message: “ on the output display. Try installing an updated driver for your video card.”