If your computer has internal Bluetooth (most laptops and many desktops do), it can cause a serious hardware conflict. Windows may not know which Bluetooth radio to use. To fix this:

Once the driver is loaded and the built-in Bluetooth is disabled, you can proceed to connect your devices. Click on the Bluetooth icon in the system tray or go to Settings > Bluetooth & devices to add a new device.

after the installation is complete to ensure all drivers are loaded correctly. Installing the Driver (Step-by-Step)

UGREEN’s official support page offers a generic Realtek driver for legacy systems: support.ugreen.com (Search for “Bluetooth 5.3”).

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Ugreen Bluetooth 5.3 - CM591 - Chip ATS2851 : r/pchelp

Troubleshooting: "No Driver Available" or Generic Driver Issues

Getting Started with the UGREEN Bluetooth 5.3 Adapter : A Quick Guide If you just picked up a (like the popular