Today’s video will teach you how to add a new computer to your Office 365 Microsoft account and how to deactivate an old computer, in order to install the software in another PC. One thing to keep in mind is that once you deactivate Office 2013 from one of the computers, you won’t be able to use it anymore and you manually need to uninstall the software. Source YouTube All content on this site is provided with no warranties, express or implied. Use any information at your own risk. Always backup of your device and files before making any changes. Privacy policy info.