If you're a Surface Pro 1 or Surface Pro 2 user and planning on upgrading to the latest Insider Preview build, we've got some bad news for you. Build 14915 is breaking the WiFi adapter on a number of older Surface Pro devices, and it doesn't look like there's a fix for it.
A number of Surface Pro 1 and Surface Pro 2 users, including me, are experiencing this issue. Some users have said that reverting back to the previous build fails too, so the only real fix right now is to clean install a production build.
Ugh on 14915 pic.twitter.com/jYguDR4ox9— Zac Bowden (@zacbowden) August 31, 2016
Microsoft engineers are aware of the problem, and say they are looking into getting this fixed in upcoming builds. In the meantime however, it is advised you do not update to this build if you are using a Surface Pro 1 or 2. If you have upgraded, you may have luck in downgrading back to your previous build. If not, reinstalling a clean version of Windows should do the trick.
If you've encountered this issue, make sure you let the Insider team know via the Feedback Hub.