Hi @Anonymous
You should be able to reboot your device, reinstall the BT700 and Windows 10 should recognize it. If not, please try it in a different USB port. If it's the headset that's not recognised rather than the Bluetooth adapter, please do the following:
Connect the BT700 to your computer.
Put your headset into pairing mode.
Download the Poly Lens App if you don't already have it. Within the app you'll select "Pair" and your adapter will flash red and blue.
Pairings are successful when you hear "pairing successful" and "PC connected".
I hope this answers your question.
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