910XT and win10 didt pair

I've recently bought a new Windows 10 machine. My old PC (Win Vista) worked fine with my ANT and 910XT. I've downloaded Garmin Express, and it recognizes my ANT port, as well as my watch. However, when I go to "pair"the watch, it doesn't work. I have navigated Settings>System>Data Transfer>Pairing and set it to ON.
Do I need to remove my watch from being paired on my old pc before it will recognize it on the new pc?

Please help