I have a creative Cloud Subscription.
Once I use it under Mac OS no problem.
But if I try to use it under a Windows 8.1 partition, on the same computer, CC will not uthenticate Illustrator, all other apps are ok and running regularly.
Once I lounch AI it keeps asking for connection to internet in order to authenticate.
Although Creative Cloud software is connected and logged in with my user account.
A chat session where an agent may remotely look inside your computer may help
Creative Cloud chat support (all Creative Cloud customer service issues)
Honestly I do not like people snooping around my computer remotely ......
But I would know what to do if there was a different method to authenticate Illustrator. es:Like editing Windows Register file......
For the moment I will use just the Mac version that does not have this kind of problems and performs much better.