Hi Alex,
This looks like a Bluetooth audio driver crash issue on Windows 11 with Surface devices. During Teams calls, the audio driver is being removed from Device Manager and only returns after a restart, which points to a driver-level issue.
You can try the following steps:
➜ Install the latest Surface firmware and full driver pack (do not rely only on Windows Update)
➜ Open Device Manager → Bluetooth adapter → Properties → Power Management
➜ Disable “Allow the computer to turn off this device to save power.”
➜ Uninstall both Bluetooth and Audio drivers completely
➜ Restart the device and let Windows reinstall them automatically
➜ Go to Sound settings → Device properties
➜ Turn off Audio enhancements and Spatial sound
➜ Test with a different or generic Microsoft Bluetooth audio driver to rule out conflicts
If the issue still continues after this, it is likely a deeper firmware or driver stability issue on Surface Laptop 7 with Windows 11 25H2 and Teams, and may require a Microsoft firmware update to fully resolve.
If this helps, please mark the answer as accepted and upvote it so others can benefit too.