When you open the Microsoft Management Console (MMC) for Internet Information Server 4.x, the following error message appears:

Error connecting to [Computer Name]: The RPC server is unavailable.

where [Computer Name] is the name of a computer but that name is not currently in use. For more details please see:

"Updating IIS after the Computer Name Is Changed" http://support.microsoft.com/support/kb/articles/Q234/1/42.ASP