If the dongle appears with a yellow warning triangle or as an unknown device: Device Manager , right-click the device and select Update driver Browse my computer for drivers Let me pick from a list of available drivers on my computer from the list, then choose Generic Bluetooth Adapter
Do you have the from Step 3? (I can find the exact link for you with that). Update Bluetooth drivers in Windows - Microsoft Support
, here is a comprehensive overview covering its identification, installation, and common troubleshooting steps.