I had once a similiar problem of Windows 7 and 10 refusing to connect, just showing that FP2 is there.
I digged a while and found a stackoverflow post (but don’t find it again).
It mainly said: I had Windows N (without media player) so I had to install media package and after that I could access my FP2.
For win10 this link should do it: https://www.microsoft.com/en-US/download/details.aspx?id=48231
Win7 should do this: https://www.microsoft.com/en-us/download/details.aspx?id=16546
Thing for me was: neither Windows nor Android told me what’s missing.