You may want to check your 2 versions of Office on the same partition. From all the reading that I've done on this subject 2 versions of Outlook cannot co-exist on the same partition. I think you will find that all the other applications play nicely together however Outlook 2003 was probably uninstalled after Office 2007 was installed. If I'm wrong, please let me know because I've installed them on 2 partitions for that very reason.