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Microsoft 365 and Office | Install, redeem, activate | For home | Windows
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Are you seeing an option to Repair Now? In that case, exit all Office apps and then choose to run an Online Repair instead (which will be more thorough).
Before you begin, verify that you can access your Microsoft account at https://account.microsoft.com/services and that Office is associated with it. That way, you ensure that you can reinstall Office which is usually the final step of an Online Repair.