Setup instructions and commands for Windows 10 Laptop or Workstation

Open elevated command prompt

net user Administrator /active:yes

net user Administrator *

wmic useraccount where name='<OLD_USER_NAME>' rename '<NEW_USER_NAME>'

Log on to another administrator account
Rename directory
Run regedit
Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\
Find the relevant ProfileImagePath key in the user accounts SID folders and change value to the new path
Log out of Administrator account
Log on to user account

Log on to Administrator account
Copy User profiles directory to new location, optionnaly renaming it (ignore locked temporary files)

cd c:robocopy /copyall [/mir|/E] /xj Users <NEW_DRIVE_LETTER>:Users/xd WindowsApps /xd OneDrive
Method A: Updating registry values * Run regedit * Browse to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList
- Adjust values of the Default, ProfilesDirectory and Public keys to the new location
- Adjust the ProfileImagePath keys in the users accounts SID folders and change value to the new path
- Remove old folder after verifying everything is working
rmdir /S /Q C:Users
Method B: Using NTFS folder junction * Remove old folder after verifying everything is working

rmdir /S /Q C:Users
- Create folder junction pointing to new Users folder location
mklink /J Users <NEW_DRIVE_LETTER>:Users