To install the driver for the UGREEN Bluetooth 5.0 USB Adapter (Model CM390 / Part Number 80889), you can use the included installation CD or download the latest version from the UGREEN official website. Installation Prerequisites
Driver Error: If you see a "Driver Error" message in Windows Settings, uninstall the device from Device Manager, unplug it, and run the setup.exe again as an Administrator. ugreen bluetooth 50 usb adapter cm390 driver install
The OS identifies the device via its Vendor ID (VID) and Product ID (PID). For the CM390, these identifiers typically map to Realtek generic identifiers (e.g., VID_0BDA&PID_8771). The complexity of installation often arises when the operating system attempts to match these IDs against its generic driver library, frequently resulting in a "Bluetooth Dongle" error or limited functionality. To install the driver for the UGREEN Bluetooth 5
Features low audio delay (approx. 100ms), making it suitable for video and light gaming. Compatibility: Works with Windows (7/8.1/10/11) and Linux. It is not compatible with PS5, PS4, or Nintendo Switch. Driver Installation Guide For the CM390, these identifiers typically map to
Phase 2: Driver Acquisition Because UGREEN acts as the OEM, they host the specific driver binary on their support servers.
Success indicator: After reboot, "Bluetooth" appears as a category in Device Manager, and the system tray icon appears.