If you have Office 2007 or prior products installed and you try to install Office 2010, you receive a fun error message warning you that this is not possible and that you must uninstall all Office 2007 products before proceeding. Fortunately, there is a bit of a work around.
While you do have to uninstall all Office 2007 products to proceed with the installation, you can selectively reinstall them afterwards. I did this for Microsoft Office InfoPath 2007, as we are not ready to migrate our forms to 2010.
There is one limitation: You can’t install Outlook 2010 next to Outlook 2007. It will simply not work. Only one version of Outlook can be installed and Office 2010 will make Outlook 2010 that version.
#1 by Alex Angas at May 27th, 2010
You might already be aware of this since this post was written, but InfoPath 2010 fully supports targeting forms for InfoPath 2007.
#2 by Clifton Griffin at May 28th, 2010
Interesting, thanks for letting me know.
Fortunately I am not on any InfoPath projects at the moment.
#3 by Chisaw at June 29th, 2010
Hmm, if I install Office 2010 why do I need to reinstall Office 2007 now? To have to Office software bundles? What for?