Hi ntegr8r,
I found this fix on another thread and it has worked.. so glad I did it, give it a try.
Un-install Photoshop CC.
Un-install Adobe CC.
Go to: C:\Program Files (x86)\Common Files\Adobe and find SLCache and delete it.
Go to: C:\ProgramData\Adobe and find SLStore and delete it.. you might have to 'show hidden folder' to see this one. (Go to Organize in any folder and hit Folder and search options, go to view, click Show hidden files and folder, apply, ok)
Restart.
Install Adobe CC.
Install Illustrator.
Restart.
I hope this helps.
Bryton