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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