Install as an Administrator

Even users with administrator permissions must explicitly invoke those permissions to run programs that require elevated privileges. This is part of the Windows security system.  

To run the installer as an administrator, do the following:   

• Download the latest add-in version to your preferred folder
• Right-click on GrammarlyAddInSetup.exe and select Run as administrator
• Click Yes

If you don't have this option, log in to Windows using the administrator account and install the add-in.