To do that, use these steps: If the Bluetooth entry is missing from the Device Manager, visit your Bluetooth adapter manufacturer's website to download the driver and install it manually.

But at times, some users have found that when they go on to use Bluetooth, they find that the option to turn on Bluetooth is missing in ... Enable Bluetooth from Device Manager.

you have to uninstall the driver of your Bluetooth headphones via the Device Manager. After doing that, restart your computer. Windows will automatically install the missing driver on restart.