When you try to reinstall a BackOffice 4.5 component, the setup program inspects the SOFTWARE hive of the registry. If the component is already installed, you can't reinstall it.

To workaround this difficulty, first manually delete the registry key for the component.

Use Regedt32 to navigate to:

HKEY_LOCAL_MACHINE\Software\Microsoft

Here is a table of sub-keys:

  Registry Sub-Key     BackOffice 4.5 Component  
  Inetkit1     Intranet Publishing Kit  
  Inetkit2     Intranet Collaboration Kit  
  BackOffice Web Administrator     Web Administration  
  BackOffice Administrator     BackOffice Administration  
  BackOffice\Help     BackOffice Help Files  

NOTE: The Intranet Collaboration Kit includes the Intranet Publishing Kit.