I was reinstalling my Microsoft Office 2003 today as my laptop Windows Vista suddenly unable to boot into windows for no particular reason. Check the event log and cannot find any error message.
After doing a recovery from the recovery media, I went to uninstall Microsoft Office 2007 Trial that came with my laptop and install Microsoft Office 2003. However when I try to launch MS Word, Excel or even Outlook, I get the “Office application version does not match.” error.
Solution: I realised I forget to uninstall “Business Contact Manager for Outlook 2007” under Start -> Control Panel -> Programs -> Uninstall a program. Went to uninstall and manage to remove the error.