You may try running sfc /scannow in CMD or Windows* System Restore.
I ran sfc/scannow. Windows Resource Protection did not find any integrity violations.
I cannot perform a System Restore because the Restore Points do not go back that far in time to when the Bluetooth was working properly.
Any other suggestions, please?
I tried this HotFix before and unfortunately it wouldn't work. I get a message, "The update is not applicable to your computer" although it is applicable.
I also attempted the same HotFix for all three different platforms just to try them but they wouldn't work either and I receive the same message.
Have you tried updating or reinstalling your Bluetooth and Wireless network drivers?
You might want to download the current versions from Dell, then do a clean install of the drivers in your PC.