Acrobat DC Pro sign-in problems

Greetings,

After re cloning some PC's users are having problems signing on, in order to pick up a license.

Adobe help text is this: 

https://helpx.adobe.com/in/x-productkb/global/update-operating-system-and-browser.html

I have tried with all kind of browsers, IE11, Chrome, Edge but nothing helps and the Reg-fix doesn't seems to apply correctly when I run an import. 

I´m running following setup:

Acrobat DC Pro: 2015.006.30527

W10 Enterprise

PC's: i7, 16 GB

Any help is highly appreaciated.

Thanks 
Soren Krebs, Spain.