Finding a way to access CURRENT_USER registry as a LocalSystem Service [C#]

[Shaitan00]

I have a little situation that I cant seem to resolve and was hoping someone might have some suggestions ...

I have a Windows Service (Serv.exe) which runs under LocalSystem when a user is logged-on (it is only running when users are logged-on), this service is responsible for performing various administrative tasks, one of which is applying registry (.reg) files when needed.

The Services uses REGEDIT (/s /i) to merge in the registry files (.reg) - and this is where things get rough - these registry files related to HKEY_CURRENT_USER (for the user currently logged on) - obviously this causes issues because regedit is being run as a LocalSystem (which is not currently in the HKCU of the user itself) ...

Is there anything I can do?
Can I somehow LINK to the users HKCU so that when I apply the .REG file it updates the users registry?
Can I mirror or reflex the changes somehow?

From where I stand my only solution would be to create my own REG EDIT that would redirect to the logged-on users HKCU (which would be a pain). Ive already tried creating a service to mirror HKCU->HKLM but the LocalSystem doesnt seem to have an HKCU at all - so that doesnt help ...

Key point - I do NOT have the username & password of the User account so I cannot use Impersonation... And even there I need admin access to perform my changes.

Any help would be greatly appreciated...
Thanks,

 

[snarfblam]

There is an absolute path to any users root registry key (they are all located in HKEY_USERS), but you would need to figure out which one belongs to the current user and have admin access to use the keys this way.