Microsoft office professional 10 keygen

Reinstalling Office 10 Professional Plus. Common reason #1: Hopefully you are not trying to activate Office with the product key printed on the Certificate of Authenticity (CoA) affixed to the computer itself---that's for Windows, not Office. Common reason #2: There is another installation of Office on the computer that is not designed to accept Pro Plus product keys. Most likely the case, as the factory restore probably reinstalled the Trial of Office that came with the computer. Go to the Programs applet of Control Panel, uninstall anything that has to do with Office, restart twice, then try again with your Pro Plus. Post back to let us know how it goes. 4 people found this helpful.