Reregister DLL post DPM SP1 install

Error message when you perform various System Center Data Protection Manager (DPM) 2007 operations after you install DPM 2007 Service Pack 1: "An Unexpected error occurred during a VSS operation"

You install Microsoft System Center Data Protection Manager (DPM) 2007 Service Pack 1 (SP1) on a system. However, when you perform various operations, you receive the following error message:

An Unexpected error occurred during a VSS operation.
ID 207 Details: No such interface supported (0x80004002)
Recommended action: Retry the operation