Try this in order:
- Reset the graphics driver shortcut:
- Press Windows logo key + Ctrl + Shift + B.
- If that does not help, restart the PC.
- Check whether Task Manager flickers:
- Press Ctrl + Alt + Delete and open Task Manager.
- If Task Manager does not appear, press Ctrl + Shift + Esc.
- If Task Manager flickers too, the problem is likely the display driver.
- If Task Manager stays stable while the rest of the screen flickers, the problem is likely an incompatible app.
- If it looks like a display driver issue, fix the display driver:
- Open Device Manager from the taskbar search.
- Expand Display adapters.
- Right-click the display adapter and use one of these options:
- Roll Back Driver if Windows Update recently updated the device.
- Update driver to look for a newer driver.
- Uninstall Device from Properties > Driver and restart so Windows attempts to reinstall it.
- Note: rolling back or uninstalling a driver requires administrator privileges.
- Note: if the uninstall option to remove the driver software is not shown, start the PC in safe mode first.
- If it looks like an incompatible app:
- For Microsoft Store apps, install available app updates.
- For non-Store apps, get the latest version from the device or app manufacturer.
- If the issue started after installing a specific app, uninstall it:
- Windows 11: Start > Settings > Apps > Installed Apps
- Select the app > Uninstall > Uninstall
- Restart and test after each uninstall.
- Because this started after an update, if the issue began immediately after a recent Windows update, uninstall the recently installed update from recovery options:
- Go to the sign-in screen.
- Hold Shift and select Restart.
- In recovery, select Troubleshoot > Advanced options > Uninstall recently installed quality updates.
- If needed, use System Restore from the same recovery area and choose a restore point from before the issue started.
- Since this is an Insider Preview build:
- Check whether a newer Insider build is available and install it.
- If the issue continues on the latest build, submit feedback with WIN + F.
If the screen is too unstable to follow the steps normally, use safe mode first.