Welcome to the forum, @Petrosik.
In order to understand better what we are dealing with here, please download and run the TSG System Information Utility on the affected PC, and then post the results back to this thread.
Furthermore, please post the make & model of the projector you're attaching to your machine.
In order to understand better what we are dealing with here, please download and run the TSG System Information Utility on the affected PC, and then post the results back to this thread.
Furthermore, please post the make & model of the projector you're attaching to your machine.