Let us show you to uninstall Office 2016 and install Office 365—whether you're using a PC or Mac. For more help, visit https://support.office.com/.
From Microsoft Office 365
Learn how to repair, uninstall, and reinstall Office Starter 2010. For other helpful videos go to hp.com/supportvideos or youtube.com/howto4u. More support ...
From HP Computing Support
In 2016, combined with Windows 10, you need to redeclare your default apps for Excel, PowerPoint et al. This video shows you the very quick fix. I hope it helps.
From Brain Diesel
Tube: How to Uninstall Microsoft Office Professional Plus 2013 If U are not confident U can detect 'n clean the related remnants, TRY this uninstall tool PRO@ ...
From UninstallNext PUPCleaner