The TP-Link adapter uses a similar driver package to Plugable's and, likely, the same chip. Plus, ... Plugable's USB-BT5 Bluetooth 5.0 adapter is currently selling for $13.

The best next step, then, is to uninstall every Bluetooth driver. If you’re using a dongle, then uninstall the USB controllers as well. To get these things done, click on the Windows key + R ...

The built-in Bluetooth troubleshooter of Windows 11/10 OS can help you find and fix various problems by checking Bluetooth capability, turning on Bluetooth, etc. This might work for this problem too.

However, your computer may have a Bluetooth adapter from Mediatek. Unfortunately, if this is the case, the Intel driver won't work since it is incompatible with Mediatek.

The most efficient and straightforward way to determine if your computer has an internal Bluetooth adapter installed is to simply search for the device using the Windows 8 Search feature.

If Windows 7 is unable to find the driver for your printer, ... Turn on the printer, and then confirm that the Bluetooth dongle is connected to it. Open the Windows Start menu.