Manually uninstalling Intelligent Message Filter v1 prior to exchange 2003 service pack 2

When installing Exchange Server 2003 Service Pack 2 to an existing Service Pack 1 system, the service pack can fail if the update for the Intelligent Message Filter v1 is already installed.
To manually remove Intelligent Message Filter v1

1.     Stop all Exchange services (Information Store, System Attendant, SMTP, and Exchange-aware antivirus services).

2.     Rename the MSCFV1 folder in X:\Program Files\Exchsrvr\bin, where X is the drive letter where Exchange Server is installed.

3.     Rename the ContentFilter.dll file in X:\Program Files\Exchsrvr\bin\, where X is the drive letter where Exchange Server is installed.

4.     Open regedit and export the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Exchange key.

5.     Delete the ContentFilterVersion sub key from the registry.

6.     Restart the server. You should now be able to install Exchange Server 2003 SP2 without errors.