On your PC, double-click the in the status bar. Click Add a device and select your device from the list.
If you need to manually install the driver or want to ensure you have the most up-to-date version, it's best to download it directly from UGREEN's official website. ugreen bluetooth 5.0 usb adapter cm390 driver
This error means Windows can't find a suitable driver. It most commonly occurs on Windows 7 and 8.1 systems. Download the driver package manually from UGREEN's official site as described earlier. If the automatic installer doesn't work, you can try manually pointing Windows to the driver files: On your PC, double-click the in the status bar
Upon first insertion: