There are several different reasons why you would want to uninstall Office 365 from your computer. You could be having issues with the program and must reinstall the program. You could be changing to another program or model of office such as Office 365 or OpenOffice. Your subscription may have ended, and you either do not want to renew or want to use the program on a new computer.
Whatever the reason, the guide below covers various methods, from simple to complex.
Microsoft Support website has guides to walk you through the different methods to remove Microsoft Office 2016 or 365 from your Dell computer:
Method I Uninstall using the Control Panel
Method II Uninstall using the Easy Fix Tool
Method III Uninstall manually
Click-to-Run - Streaming Installer
MSI - Microsoft Windows Installer
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