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Repair your Office Installation Video Tutorial If you do not have the installation tied to a Microsoft account, you'll need to have your key code handy. User settings and files won't be affected or lost when using Online Repair but activation may be lost. Online Repair is essentially an uninstall and reinstall. Quick Repair will check files and replace missing or potentially corrupt files.
![uninstall and reinstall outlook 365 uninstall and reinstall outlook 365](https://www.msoutlook.info/pictures/regedit-signatures-clsid-localserver32.png)
In Windows 10, open the Control Panel then find Programs and Features or Add or Remove Programs. You can open it by typing Add or Remove Programs on the Start screen or in Search.
![uninstall and reinstall outlook 365 uninstall and reinstall outlook 365](https://images.wondershare.com/repairit/article/open-uninstall-a-program-in-control-panel-9.png)
Use the Repair process in the Control Panel's Programs and Features or Windows 10 Settings. Select the desired repair option and complete the wizardįor the steps and screenshots specific to older versions of Outlook, see:.
![uninstall and reinstall outlook 365 uninstall and reinstall outlook 365](https://www.ramsu.co.nz/wp-content/uploads/2016/07/outlook7-768x483.png)
![Uninstall and reinstall outlook 365](https://cdn1.cdnme.se/5447227/9-3/7_64e61dfbddf2b36517292648.png)