Problem solved, for contributing to the forum, the HP Display Control Service by Portrait Displays conflicts with the FENCE application causing a darkening of the secondary windows. Thank you so much
Sorry, but why does it get fixed when I uninstall the FENCE program, it doesn't make sense, the error should continue appearing when I uninstall FENCE.
I have uninstalled FENCE and the error is corrected. It also happens to me when I am out of the office without the secondary screen, only the main screen lights up, leaving the rest of the screens dark. Someone has a solution for this problem. Moved to Fences area