the preferences file is corrupt

Hi,

I've setup CC on a fresh install of win10 pro and every time I start illustrator I get this notification about the reset of my preferences.

I searched for some solutions but could not solve the problem.

What I#ve tried so far:

*) Illustrator preferences get corrupted frequently | Windows-only

This one was promising since I have multilanguage setup on my devices (DE & EN) Adobe and Windows are mainly running in the english version (en_US)

*) How to set preferences in Illustrator

Wasn't actually helpful. I did delete the two prefs files, but the error still appears

*) Preferences folder read-only error | Permissions issue

Despite there were no 'deny' settings applied I added extra write permission for users. Error still appears

*) I created my own workspace and saved it. After the next start the error appear again but I could find the saved workspace, selected it once again and restarted Illustrator and the error was gone - also on my 2nd workstation I use.

The workspace I saved was not synced to the other workstation.

So I solved the problem half way without knowing how...