See http://www.howto-outlook.com/faq/interfaceerror.htm

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Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
http://www.howto-outlook.com/
Outlook FAQ, HowTo, Downloads, Add-Ins and more

http://www.msoutlook.info/
Real World Questions, Real World Answers

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"Don" wrote in message
...
How do I correct the message interface has returned an unknown error. I
tried to reinstall Microsft Office, but it didn't hep at all.