Since first posting on the problems with downloading and installing Windows 10 Insider build 14951 to Fast Ring enabled devices, the forum post has continued to grow, with some 4500 views and over 160 comments, basically unanimously echoing the same problem, that the download is stuck at “Downloading updates: 0%”.
The problem, as noted by some of the forum posters, appears to be not with 14951, but with the current Fast Ring Insider build, 14946. A workaround exists, which is to go back to build 14393, and then update to 14951 from there, but be warned that if you do, according to Windows Central’s Zac Bowden, you’ll still be facing the same issue in the next update cycle:
I wouldn't recommend that though, as I think 14951 also has that WU issue heh
— Zac Bowden (@zacbowden) October 20, 2016
According to posters on the forum thread, the Windows Update issue not only affects new builds, but downloading and installing language packs, as well.
Microsoft has said little on the issue, with no response in the forums other than the initial post by Jason Howard. Dona Sarkar has tweeted twice, first yesterday afternoon about the time the 14951 blog post was updated to acknowledge the issue, and then again at about 10:30pm Pacific time last night:
#WindowsInsiders on Fast Ring mobile: we're still looking at the download issue, as I mentioned before. I'll update once we know more.
— Dona Sarkar (@donasarkar) October 20, 2016
To workaround the issue, which we don’t really recommend as it won’t really fix anything, you can revert your device to 14393 using the Windows Device Recovery Tool, and then going back to 14951.
Hopefully we’ll have more news on a more robust fix soon, as always we’ll keep you posted.Further reading: build 14951, Windows 10 Mobile