Hello Power_tile,
Thank you for posting in Microsoft Community forum.
Based on the troubleshooting steps you've already taken, it seems like you've covered most of the common solutions to this issue. However, there are a few additional steps you can try:
- Reset your Bluetooth headset: Some Bluetooth devices have a reset button or option that can help resolve connectivity issues. Check the user manual for your Bose QC35 II headset to see if there is a reset option, and try resetting the device before attempting to pair it again.
- Update your Bluetooth drivers: Even if you've already updated your Bluetooth drivers, it's possible that there is a newer version available that could help resolve the issue. Check the manufacturer's website for your PC's Bluetooth adapter to see if there are any updates available.
- Disable other Bluetooth devices: If you have other Bluetooth devices connected to your PC, try disabling them temporarily to see if that helps with the connectivity issue. Sometimes having multiple Bluetooth devices connected at once can cause conflicts.
- Try a different USB port: If your PC has a USB Bluetooth adapter, try plugging it into a different USB port to see if that helps with the connectivity issue.
If none of these steps work, it's possible that there is a compatibility issue between your Bose QC35 II headset and your Windows 11 PC.
I hope the information above is helpful.
If you have any question or concern, please feel free to let us know.
Best Regards,
Haijian Shan