NVIDIA Overlay (part of GeForce Experience) often fails due to fixable issues. Here’s how to troubleshoot:

Anti-cheat systems or other overlays (like Discord/Steam) frequently block NVIDIA Overlay.
Check game forums for known conflicts with anti-cheat tools.
Close competing overlays to avoid interference.
Disabled overlay or hotkey clashes are common culprits.
In GeForce Experience, ensure "In-Game Overlay" is enabled.
Verify overlay hotkeys (e.g., Alt+Z) don’t conflict with games/apps.
Old drivers or GeForce Experience cause compatibility issues.
Update GPU drivers via GeForce Experience’s "Drivers" tab.
Install the latest GeForce Experience version in settings.
Lack of admin rights or firewall blocks restrict functionality.
Run GeForce Experience as admin (right-click > Properties > Compatibility).
Add NVIDIA apps to your security software’s whitelist.
Damaged installation files break core functions.
Repair via Control Panel > Programs > NVIDIA GeForce Experience > "Repair".
If repair fails, reinstall from NVIDIA’s official website.
If problems persist after these steps, contact NVIDIA support for further help.