It can also be run after the upgrade has finished, the files would still be in "c:\windows.old\windows\softwaredistribution\downloads\". I see @adguard released a leaked "15063.2.rs2_release_svc_d.170531-1743 (UUP-CTv2)" build but sadly he released it as UUP converted iso not as UUP files.
Dona is very specific about releasing Build next week in Windows blog. So we aren't getting any Build by weekends.
Well I need a new build as the keyboard has stopped working on opening page (works ok on other drive with win 10)..I can get in using on screen keyboard but the program is useless with just a mouse. Troubleshooting and one answer was "Text services framework not running", h'mm checked and it is....and then it says driver corrupt, crappy system when you try to update driver and get the reply the best driver is already installed, and from another drive got fed up trying to copy keyboard.inf and drivers to replace, with win 10 protection system.
you have build 16212? did your keyboard work previously w/ this build? If you have any try a restore point..
https://forums.mydigitallife.net/threads/multi-oem-retail-project-mk3.71555/page-55#post-1350413 Adguard tweeted it 3hours ago.