Start by restarting the computer
Login as a different administrator
Turn on show hidden files and folders
Open regedit
Click on HKEY_USERS
Click File Load Hive
Open the NTUSER file from the users folder
When prompted for Key Name: you can name it whatever you would like.
Push the plus by HKEY_USERS, then the Key you just named, Software, Microsoft, Windows, CurrentVersion, Explorer, User Shell Folders.
Modify the keys that point to the old server name. Specifically the Personal key.
Click on the key name you labeled and then click file unload hive.
Restart the computer