Locate the setup.exe file within the extracted folder.
Download the driver package specifically for Windows (usually supports Windows 7, 8.1, 10, and 11).
Older Bluetooth caches can prevent successful pairing. ugreen bluetooth 50 usb adapter cm390 driver install
If you see LMP 8.x: You are running a generic driver. Re-do Method 3 to force the Realtek 5.0 driver.
If your laptop or desktop already has an internal Bluetooth chip, you must disable it first. Go to Device Manager > Bluetooth , right-click the internal adapter (e.g., Intel Wireless Bluetooth), and select Disable device . Locate the setup
If your computer has a built-in Bluetooth card or if you are using an older USB Bluetooth dongle, disable it. Running two Bluetooth radios simultaneously will cause driver conflicts.
The UGREEN CM390 supports up to five simultaneous active Bluetooth connections. You can pair many more devices, but only five can be actively connected at any given time. If you see LMP 8
If your laptop or desktop motherboard already has built-in Bluetooth, you must disable it. Open Device Manager (right-click the Start button and select it), expand the Bluetooth section, right-click your internal Bluetooth adapter (e.g., Intel Wireless Bluetooth), and click Disable device .