If you are talking about Outlook 2003, then see http://support.microsoft.com/kb/896866/en-us "When you try to start a
Microsoft Office 2003 program for the first time, you receive the
'Installation Error: File not Found' error message". You can help us to
help you by quoting the error message correctly and completely.
If your getting this message on installation check to see if there is an
office trial installed on your system. In Vista this will be found in the
control panle classic view under programs and features... in win xp under add
remove programs..if theres a trial in there get rid of it it'll cause you
problems.
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