Editing the Registry for a Single User in Citrix, RDS or Similar Environment

You can change the user's registry under HKEY_USERS you just need to know which one is theirs.

You find that out by looking in HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\HiveList and finding the user in the Data column.

Make a note of the String on the left and use that part of HKEY_USERS.

You need to do this while the user is logged in.