Try these steps in order:
- Reset the graphics driver:
- Press Windows key + Ctrl + Shift + B.
- If nothing changes, restart the PC.
- Check whether Task Manager also flickers:
- Press Ctrl + Alt + Delete and open Task Manager.
- If Task Manager flickers too, the problem is likely the display driver.
- If Task Manager does not flicker while the desktop does, the problem is more likely an incompatible app.
- If it looks app-related, update or remove recently installed apps:
- Go to Start > Settings > Apps > Installed apps.
- Find the app.
- Select it, then choose Uninstall > Uninstall.
- Restart after removing the first app and check whether the blinking stops.
- If the app came from Microsoft Store, check for updates there first. If it came from elsewhere, check the app maker’s site for updates.
- If needed, reinstall the app:
- Open Microsoft Store.
- Select Library.
- Select the app and choose Install.
- If the screen is hard to use while troubleshooting, start the PC in safe mode and then follow the same steps.
In Windows 11, screen flickering is usually caused by a display driver issue or an incompatible app.