Ugreen Bluetooth 5.0 Usb Adapter Cm390 Driver __top__ -

UGREEN Bluetooth 5.0 USB Adapter (CM390): Driver Installation & Troubleshooting Guide

The UGREEN Bluetooth 5.0 USB Adapter (model CM390) is one of the most popular dongles for adding wireless connectivity to a desktop PC or an older laptop. It’s compact, affordable, and based on the reliable Realtek RTL8761B chipset.

However, a common point of confusion is the driver situation. Does it need one? Does Windows install it automatically? What if it doesn’t work?

Let’s clear this up.

Step 1: Avoid Fake Driver Websites

Never download “driver updater” software or from unknown sites like driver-fixer.com. The safe sources are:

• UGREEN Official Support (ugreen.com/support)
• Realtek Official Website
• Microsoft Update Catalog

Q1: Does the CM390 work on Windows 7?

A: Yes, but you must download the driver from UGREEN’s website. Windows 7 lacks native Bluetooth 5.0 drivers. Also, you need to have installed the KB3020369 and KB3172605 updates for USB 3.0 support. ugreen bluetooth 5.0 usb adapter cm390 driver

Method 1: The Official UGREEN Support Website (Recommended)

1. Open your browser and go to the official UGREEN Support page (support.ugreen.com).
2. In the search bar, type "CM390" or "Bluetooth 5.0 Adapter".
3. Select your product from the list.
4. Navigate to the "Downloads" or "Drivers" tab.
5. Download the file named something like: “UGREEN_Bluetooth_5.0_Driver_CM390_Win7_8_10_11.zip”

Part 6: Hardware Alternatives – When the Driver Isn’t the Problem

Sometimes, the UGREEN CM390 might be genuinely faulty or incompatible with your specific device. Here are superior alternatives depending on your use case.

| Use Case | Recommended Adapter | Why? | | :--- | :--- | :--- | | Windows 11 – Best All-Round | TP-Link UB500 (Bluetooth 5.0) | Uses same Realtek chip but with better antenna. Drivers on TP-Link site are updated frequently. | | Linux Native (no firmware hassle) | ASUS USB-BT500 | Mediatek chipset – firmware included in Linux kernel 5.7+. | | macOS / Hackintosh | Any Broadcom BCM20702-based dongle (e.g., IOGEAR GBU521) | Native support with BlueToolFixup. Realtek chips on macOS are a nightmare. | | Bluetooth 5.3 / LE Audio | UGREEN CM491 (Bluetooth 5.3) | Newer chip, better power efficiency, but still Realtek-based. | UGREEN Bluetooth 5

If you decide to stick with the CM390, it remains an excellent choice for Windows users who don’t mind a 5-minute driver setup.

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Part 1: What is the UGREEN CM390?

Before diving into drivers, let’s understand the hardware. The UGREEN CM390 is a nano-sized USB Bluetooth adapter. UGREEN Official Support (ugreen

• Chipset: Realtek RTL8761B (Most common variant) / or sometimes a compatible CSR chipset.
• Bluetooth Version: 5.0 (Backward compatible with BLE 4.2, 4.0, 3.0, 2.1, 1.2).
• Data Transfer Rate: Up to 3 Mbps.
• Effective Range: Up to 20 meters (66 feet) in open space.
• OS Support: Officially supports Windows 11, Windows 10, Windows 8.1, and Windows 7. Note: It does NOT support macOS, Linux, or Android TVs via USB.

The "CM390" is UGREEN’s specific PCB and casing design for their flagship Bluetooth 5.0 dongle. It is plug-and-play for Windows 10/11 only if Windows Update is enabled. However, many users disable Windows Update or need the driver for older OS versions, which is why the driver file is critical.

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