Inside the extracted folder, look for a file named setup.exe . Right-click setup.exe and select . If a User Account Control (UAC) prompt appears, click Yes .
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 .
When prompted by the installer (or after the installation completes), plug the UGREEN CM390 into a USB 2.0 or 3.0 port .
If you see an error regarding rtl8761b_fw.bin , update your firmware package: ugreen bluetooth 50 usb adapter cm390 driver install
in the bottom right corner of your taskbar (near the clock).
Open (right-click the Start button and select Device Manager).
To prevent installation conflicts and ensure a smooth setup, complete the following preparatory steps: Inside the extracted folder, look for a file named setup
Use the search bar to look up or the part number 80889 .
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.
After the installation is complete, check for the Bluetooth icon in the system tray (the bottom-right corner of your taskbar). If you see it, you can right-click it to start adding devices. You can also check in the Windows Settings app (in the "Bluetooth & devices" section) to confirm the adapter is present and active. If your laptop or desktop motherboard already has
Choose a destination path (the default folder path is fine) and click .
Ensure you unzipped the folder completely. Running setup.exe straight from a zipped archive causes files to block. "Device Cannot Start (Code 10)"
Stop searching for "CM390 driver install." The answer is .
To ensure the best stability and performance, installing the official manufacturer driver is highly recommended.
