Question: how to change user profile folder?
Answer: Create a System Restore Point.
Log on under an admin account.
Move the folder c:\Users\SomeUser so that it becomes d:\SomeUser.
Open the registry editor.
Navigate to HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList.
Search for “ProfileImagePath” until you find the one that points at c:\Users\SomeUser.