UI update today has messed everything up.

Run the Copilot connectivity troubleshooter first, because Copilot can open yet fail to respond when a firewall rule or another connection blocker affects only its service even though normal internet access works.

1. Diagnose Copilot connectivity

1. Open Start, type Get Help, and open the app.
2. Search for Copilot connectivity troubleshooter.
3. Run it and apply any recommended remedy.
4. Close and reopen Copilot, then submit a new prompt.

Microsoft states that this troubleshooter checks firewall rules and other connection blockers. ^1^

If it reports no connectivity problem:

1. Go to Settings → Apps → Installed apps.
2. Find Copilot, select More options (…) → Advanced options.
3. Select Repair, then test Copilot.
4. If Repair does not work, return to the same page and select Reset. Reset can remove the app’s stored settings and sign-in state, so sign in again afterward. ^2^

If neither option resolves it, open Microsoft Store → Library → Get updates. Install available Copilot and Store updates. If necessary, reinstall Copilot from the Store. ^3^

2. Handle the disconnected devices separately

Build 26300.9974 is the November 10, 2026 update, KB5132061. Its release notes do not identify Copilot nonresponse or general device-connectivity failures as known issues. The documented USB Audio 1.0 problem is marked fixed in this build. ^4^ The current 26H2 release-health page likewise does not list this combination of symptoms. ^5^

If the disconnected devices are Bluetooth headphones, a mouse, keyboard, phone, or similar:

1. Open Settings → System → Troubleshoot → Other troubleshooters.
2. Beside Bluetooth, select Run.
3. Open Device Manager → Bluetooth.
4. Right-click the Bluetooth adapter and select Update driver → Search automatically for drivers.
5. If Windows finds nothing, obtain the Windows 11 Bluetooth driver for the exact PC model from its manufacturer.
6. Restart the PC and reconnect the devices. ^6^

If updating does not help, use Device Manager → Bluetooth → adapter → Properties → Driver → Roll Back Driver, but only when that button is available and Bluetooth worked before the update. Alternatively, uninstall the Bluetooth adapter in Device Manager and restart; Windows should reinstall it automatically. ^7^

If “devices” means shared PCs, drives, or printers on the local network, use Settings → Network & internet → Advanced network settings → Network reset → Reset now only after other checks. This removes and reinstalls network adapters and restores their defaults; VPN software or virtual switches may need reconfiguration afterward. ^8^

3. If both problems began immediately after today’s update

After completing the targeted checks above, the safer Windows 11 recovery order is:

1. Settings → System → Recovery.
2. Under the option to fix problems using Windows Update, reinstall the current Windows version if offered. This preserves files, applications, and settings.
3. If that is unavailable or does not resolve both symptoms, go to Settings → Windows Update → Update history → Uninstall updates.
4. Select the most recently installed update and choose Uninstall, if Windows permits it. ^9^

Removing a security update reduces protection, so use rollback only when the installation time matches the start of the failures and the targeted repairs have failed. Some updates cannot be removed. ^10^

If rollback fixes both issues, pause there and report the behavior through Feedback Hub, including Windows 11 26H2, build 26300.9974, the device types, and any Device Manager error codes.

References

1. Copilot troubleshooters | Microsoft Support
2. [Windows 11](https://support.microsoft.com/windows/apps/repair-apps-and-programs-in-windows#summary)
3. [Windows 11](https://support.microsoft.com/accounts-billing/fix-problems-with-apps-from-microsoft-store)
4. November 10, 2026—KB5132061 (OS Builds 26300.9974, 26200.9974 and 26100 ...
5. Windows 11, version 26H2 known issues and notifications
6. [Windows 11](https://support.microsoft.com/windows/hardware/bluetooth/fix-bluetooth-problems-in-windows#general-bluetooth-troubleshooting-in-windows-11)
7. [Windows 11](https://support.microsoft.com/windows/hardware/bluetooth/update-bluetooth-drivers-in-windows)
8. [Windows 11](https://support.microsoft.com/windows/experience/connectivity-networking/fix-ethernet-connection-problems-in-windows#on-your-pc)
9. Recovery options in Windows | Microsoft Support
10. [Windows 11](https://support.microsoft.com/windows/deployment/updates-lifecycle/how-to-uninstall-a-windows-update#summary)