Why Can't I Choose the Primary Mode of the USB™ Display Adapter?

Some video or graphics card manufacturers ship their products with a utility that prevents other video cards from being set as the primary card. Please be sure to check the toolbar in the lower right-hand corner of the desktop. If the program of another video card is already running. disable its utility before setting it to Primary mode of the USB Display Adapter. Typically, the utility icon will be shown together with the USB Display Adapter’s icon in the lower right-hand corner of the toolbar.

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