The thing is if you are going to try out Preview/Beta software and OS then you must expect things to go wrong. An example of this is Office 2016 Preview, I have had to re-install it several times...

The latest release - Build 10074 has been out for a week or so now how come "My computer just updated to 10074"?
There are many , many threads regarding Windows 10 and the beta problems in these...