If the automatic installer fails, use the Windows Device Manager for a manual update:
How to Install RDA USB Driver on Windows 10, 8, 7, Vista, XP rda usb driver for gallite 8809 64bit
Follow the prompts, clicking Next until the installation completes. 3. Manual Installation (Recommended for 64-bit Errors) If the automatic installer fails, use the Windows
You must have Administrator privileges to install these drivers successfully. Step-by-Step Installation Guide (64-bit) If the automatic installer fails