As Bryce pointed out, using GPO can give you elevated rights,just beware of the following:

In the User section of a GPO you can put scripts in the Logon and LogOff sections, the scripts will run using the User account token, so won't have elevated rights.

In the Computer section of the GPO you can put scripts in the Startup and Shutdown sections. The scripts will run using the SYSTEM account token, so they will have elevated rights BUT you can't use Current User settings in the register, or any user based file operations.