Hi, I have the same problem as Mordies.
On Windows 10 it worked just fine. then I moved from win10 to Win 11 and probably something residual from Win10 enabled it to work.
yesterday I did a clean install of win11 and I cant get it running. No OSD, no FPS reading nothing. RTSS will send only some data - I believe it is a dummy feed from its new overlay editor.
It does not work on steam nor Epic games.
I have like Mordies AMD setup.
I did try to reinstall several times Afterburner and RTSS, install last known working versions, run it as admin, run it in compatibility modes, turn off Steam overlays and nothing.
Unlinke Mordies I need to have also an MSI afterburner as it is the only SW able to reliably control GPU's fan curve not like AMD's Adrenaline which will revert to default on every restart.
Is there any "hidden prerequisite" for Win11? Like plugins, C++ runtimes or enytling else, which is not part of default windows?
Thanks a lot