Ensure the dongle is plugged into a USB 2.0 port. Sometimes USB 3.0 ports (blue) cause interference with older 2.1.63.0 drivers.
Since Yahoo! Groups is no longer active, you won't find the file there. To download , you should look for reputable driver archives or the original manufacturer's support page (if it still exists). Common Hardware Using This Stack: ORICO Bluetooth 4.0 Adapters Sennheiser BTD 500 USB Insignia Bluetooth Adapters Various CSR8510 A10 based USB dongles Download Tips:
Many technical troubleshooting steps for version 2.1.63.0 were originally posted on Yahoo Answers .
Stay away from sites that require you to download a "Driver Installer" tool. Look for a direct .zip or .exe file. Installation Guide for Windows 10 and 11