Soren Kowalski

oof don't disable Memory Integrity blindly. if Windows Security says Memory Integrity can't be enabled cuz of incompatible drivers, that list is actually a great hint: the same drivers often trigger anti cheat blocks. remove those drivers…

ok but did you install or update any RGB, fan control or monitoring software recently? ?

Check the projectors input settings. Some TVs and receivers renegotiate audio formats after a driver change. Power cycling the projector with the PC on, or changing the TVs HDMI audio mode to PCM, can bring the endpoint back.