On my 2015 macbook pro, drivers weren't injected until after Windows was fully installed. before that, I could not switch accessibily from windows to macos. after the restart, I check apple software update, and got Bootcamp 6.1, and wifi update for bootcamp. I press option+TAB to bring it into focus. it took a while to install windows 10 and after it was doen. arted the download early in the morning, and the setup of Bootcamp worked. once it worked, Bootcamp told me that it couldn't partition the disk.
I have a slow connection, and it took a long time to download. the download of the Bootcamp support software didjn't work the first time either.
I did that, however it restored the time machine snapshots that the Bootcamp assistant removed. the Bootcamp assistant told me to run first ade in disk utility. Keep in mind, though, that it migjht now work when you setup Bootcamp the first time. I'm always glad to hep out with Bootcamp.