Ugreen Bluetooth 50 Usb Adapter Cm390 Driver Install Instant

You installed the driver, but it still shows "Driver Error (Code 10)" or "Device cannot start." Here is why.

The installation method differs slightly between Windows 10 and Windows 11.

Q: Does the UGREEN CM390 work with AirPods? A: Yes, but you need Windows 10/11 and a proper driver. After installation, go to Bluetooth settings → Add Device → AirPods (hold the button on the AirPods case).

Q: Why does my CM390 disconnect randomly? A: USB port power saving. Go to Power Options → Change plan settings → Change advanced power settings → USB settings → USB selective suspend setting → Disable. ugreen bluetooth 50 usb adapter cm390 driver install

Q: Can I use this adapter for a PS5 or Xbox controller? A: Absolutely. After driver install, pair the controller via Bluetooth. Note: Xbox Series X controllers require a firmware update from Xbox Accessories app on Windows.

Q: The driver install fails on Windows 7. Help. A: Windows 7 lacks native Bluetooth 5.0 support. You must install Windows 7 Platform Update (KB3138612) first, then install the Realtek driver. Even then, some audio profiles (A2DP) may not work.

UGREEN recently released a unified driver tool. While the box says "No driver needed," this tool resolves 99% of installation issues. You installed the driver, but it still shows

Step 1: Go to the official UGREEN support page: support.ugreen.com (Search for "CM390"). Step 2: Download the "UGREEN Bluetooth Driver Installer" (approx 35MB). Step 3: Run the .exe as Administrator (Right-click → Run as administrator). Step 4: Click "Install Driver" . The tool will automatically detect the CM390. Step 5: Wait for the command prompt window to close. Do not unplug the dongle. Step 6: Restart your PC.

Note: This tool essentially runs a script that points Windows to the correct Realtek driver folder. It is safe and verified.

Cause: Windows loaded a generic Microsoft driver instead of the Realtek driver. The generic driver recognizes the USB device but cannot turn on the Bluetooth radio. UGREEN recently released a unified driver tool

Fix:

4.1 Error: "Windows has stopped this device because it has reported problems (Code 43)" This is a generic failure signal. In the context of the CM390, this usually indicates a driver version mismatch. Resolving this requires a "clean install" of the driver, ensuring the specific Realtek driver overrides the generic Microsoft driver.

4.2 Audio Stuttering (A2DP Issues) If the driver is installed but audio playback on Bluetooth headphones is choppy:

4.3 Pairing Failures Older Bluetooth caches can prevent successful pairing.