Hello! I’m sorry that you’re running into this issue with your DVI2USB! Just to clarify, the systems that are functioning correctly have no software or drivers installed? Typically, for normal functionality the Epiphan software needs to be installed since it also contains the drivers for the DVI2USB. Without it the expected behavior is that the device is not detected and the LED glows red. When capturing the image what software are you using where you’re seeing the 1024x768 resolution? When trying to capture a different video source, do you see the same behavior?