Event ID: 7514 Severity=Error Text: An error occurred while loading Microsoft Exchange Intelligent Message Filter. The error code is <error code>.
According to the IMF deployment guide, you should simply uninstall IMF and then reinstall. I'm not 100% certain why it will not let you do this. However, I think it is a strong possibility that the SMTP service is hanging on to the failed installation. I would try to stop the SMTP service and then remove IMF.
If successful, then you should be able to reinstall. If you still have no luck then, depending on how brave you are, you could try to manually remove all references to IMF using ADSIEdit. Look for the IMF configuration settings on the server object to which you installed IMF. If you want to take this route, please get a good backup of Active Directory and your Exchange servers first. A misconfiguration in ADSIEdit could spell disaster.
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This was first published in May 2005