Hi all,
after weeks of ignoring the issue I tried another run on that. Now I found a solution for my case:
- Under
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList, check if you can find multiple user profiles with the same user Ids (but different SID). - Backup registry, won't hurt to do a full and a partial for this particular path.
- Get SID of the current users or all users you want to preserve by running
whoami /userin their session. - Removed all but user profiles with the SIDs you just gathered.
- Reboot the machine to verify user profile association, so users can still log in and access their old files.
- Start upgrade.
In my case, the laptop came to another domain and the username was equal. I had two user profiles with the same name in the OS.
Hope, this helps other people with the same problem.