Dead Pixel Checker on your LCD or LED monitor connected to a Windows computer. This utility displays red, green, and blue colored Window on all the monitors connected to your Windows computer in extended mode. In case you do have only a single monitor connected to your windows computer, then this Dead Pixel Checker Utility will display a red colored Window covering your whole screen and all the applications. In order to change the color of the colored window, you need to click left mouse button on the colored window. You can alternatively click right mouse button on the Dead Pixel Checker Utility's Window to display other options available.