New
#600
This is the most important page for Insiders that came from today's broadcast. Thank MS folks. I'll try to give more detailed feedback.
Resolve Windows 10 upgrade errors - Windows IT Pro | Microsoft Docs
I'm now in Safe Mode working with tweaking.com to fix everything it can. 199 is in so bad shape I can even do a clean reset - it rolls back. So I'm still looking at reinstalling 1703 and upgrading that and then rejoin insiders fast ring when a new build is finally released - looks like that may be next week. I'm assuming they are testing the hell out of 215. I suggest they check if they took out something besides the entire Ubuntu filesystem
Excellent section of a much larger, and equally interesting document, available from the left hand panel on the same page where Download PDF is the link to the 20MB PDF file.
One thing from the Webcast was the percentage completion of the upgrade set against the phase of the upgrade, and what is happening behind the scenes at the time, like this similar diagram from the PDF:
CU as in C U later!