I would like to know if I need to uninstall Microsoft Office Beta 2010 before I try installing Microsoft Office Professional 2007?

That can b easily with control panel > Add and remove program. What is error you receive?

No error message. I got it uninstalled. Now, can't install, rather computer won't let me install Office Professional 2007. I put disc into disc drive and nothing, installation wizard does not appear. I tried to add program thru my computer, no dice. I am at a loss as to how to install this software. HELP

see
How do I uninstall Office 2003, Office 2007 or Office 2010 suites if I cannot uninstall it from Control Panel?