Follow these steps to resolve the issue:
- Uninstall your current version of the Grammarly add-in via Control Panel > Programs and Features > right-click on Grammarly for Microsoft Office Suite > select Uninstall.
If you use Windows 10:
Right-click the Start button in the lower left corner of the screen, and select Apps and Features on the pop-up menu. Click on Grammarly for Microsoft Office Suite > select Uninstall.
- Download the latest version from https://www.grammarly.com/office-addin
- Right-click on the GrammarlyAddInSetup.exe file that has been downloaded to your machine and choose Run as administrator. If you don’t have this option, log in to Windows using the administrator account and install the add-in.