Screen Mirroring (wireless casting) on TV stopped working

It sounds like your issue with wireless casting on Windows 11 laptops could indeed be related to a recent Windows update or a network setting. Here are some steps to troubleshoot and potentially resolve the issue:

1. Check for Windows Updates: Ensure that all Windows 11 laptops are fully updated. Sometimes, new updates might fix existing issues.

   • Go to Settings > Windows Update and check for updates.

2. Rollback Recent Updates: If the problem started recently, it might be due to a recent update. Try rolling back the latest update on one of the laptops to see if it resolves the issue.

   • Go to Settings > Windows Update > Update history > Uninstall updates and choose the latest one to uninstall.

3. Network Configuration: Since all laptops are on the same Wi-Fi network, ensure there are no network policies or firewall settings that could be blocking the connection.

   • Check your network’s firewall settings and any domain policies that might affect network discovery or casting.

4. Update Wireless Drivers: Ensure the wireless drivers on all Windows 11 laptops are up to date.

   • Open Device Manager, find the wireless adapter, right-click, and select Update driver.

5. Windows Features: Ensure that the necessary Windows features for screen mirroring are enabled.

   • Go to Settings > Apps > Optional features and ensure that "Wireless Display" is installed.

6. Reset Network Settings: Try resetting the network settings on one of the Windows 11 laptops.

   • Go to Settings > Network & Internet > Status > Network reset.

7. Troubleshoot Network Adapter: Use the built-in troubleshooter to identify and fix network-related issues.

   • Go to Settings > Update & Security > Troubleshoot > Additional troubleshooters > Network Adapter.

8. Check Group Policies: If the laptops are part of a domain, ensure that no group policies are interfering with the casting functionality.

   • Open Group Policy Editor and review policies related to wireless display and network sharing.

9. Re-enable Wireless Display: Disable and then re-enable the wireless display feature on one of the Windows 11 laptops.

   • Go to Settings > Devices > Bluetooth & other devices > Add Bluetooth or other device > Wireless display or dock.

If these steps do not resolve the issue, it might be worth reaching out to Microsoft Support for further assistance or checking the Microsoft community forums for any similar issues reported by other users.
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