Ugreen Bluetooth 50 Usb Adapter Cm390 Driver Install ✪ [DELUXE]

If you are on Windows 7 or Windows 8, you may see a red error.

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.

Before downloading anything, let Windows do the heavy lifting. ugreen bluetooth 50 usb adapter cm390 driver install

Step 1: Plug the UGREEN CM390 into a USB port (preferably USB 2.0, not 3.0, as 3.0 can cause interference). Step 2: Open Settings → Update & Security (Windows 10) or Settings → Windows Update (Windows 11). Step 3: Click "Check for updates" . Step 4: Wait. Windows will download "Realtek Bluetooth Adapter" or "Generic Bluetooth Radio" via Optional Updates.

Pro Tip: On Windows 11, go to Settings → Windows Update → Advanced options → Optional updates → Driver updates. Look for "Realtek Semiconductor Corp. – Bluetooth – [Version Number]" and check the box. Click "Download & install".

Result: After a reboot, your adapter should appear in Device Manager under "Bluetooth".

How do you know you are done? A successful CM390 driver install looks like this: If you are on Windows 7 or Windows

Here is the honest truth: Windows 10 and Windows 11 usually install the driver automatically. If you are on a recent version of Windows, you can often just plug the CM390 in, wait 30 seconds, and pair your headphones.

But why are you searching for drivers? Because sometimes Windows Update is slow, you are offline, or you are using Windows 8, 7, or an older build of Windows 10. In those cases, you need to do it manually.

UGREEN recently released a unified driver tool. While the box says "No driver needed," this tool resolves 99% of installation issues.

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. How do you know you are done

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

Method A: Using the Downloaded Installer (Recommended)

Method B: Manual Update via Device Manager (If the installer fails)

Before downloading anything, try this: