In the course of troubleshooting the MSIPC rights management, it may be beneficial to reset the client. The reset process removes the pertinent registry settings and files. This reset applies to the logged on user. Other users on the same machine are not reset.
The steps are as follows.
NOTE: Feel free to export the DRM registry key before deleting it. Moving the entire MSIPC directory to another location or renaming it may be done instead of deleting it.
NOTE: The CLC*.drm file may be too long for either Explorer or the command prompt to delete. Explorer reports a "destination path too long" error and the command prompt says "the file name or extension is too long." In this case, we may use robocopy.exe to move the MSIPC directory to another location. Created a C:\Temp directory and used the following command. robocopy "C:\Temp" %localappdata%\Microsoft\MSIPC /mir
Sample contents of the MSIPC directory for the curious.