Installed on a couple of machines a few days ago via Windows Insider (Build 10162-10240), worked well with some slight drivers issues, mainly networking related, no problems with activation. Today I've tried on 4 devices and all have been a total failures, doesn't appear to be server related as two showed incompatibility issues which wasn't the case hours earlier, the rest just download, prepped for install then ERROR!!!!... Generated codes but as per usual we got the "Sorry, you haven't a hope in hell in finding out what these mean so keep clicking links/Googling until your brain explodes", yes one of my pet peeves which stems way back to the late 80's, more work finding out their definitions than it is to just wipe... My ars that is LOL.