To reinstall MS Office, locate the MS Office disc (if you have one) and insert it into the machine, then run the Setup.exe file.

Result of attempting to uninstall - and hopefully even fix MS Office itself. Over top of itself most of the time this will fix any corruption as a This will effectively reinstall MS Office If you receive an error message that it could not uninstall, then simply reinstall MS

Left click MS Office to highlight it, then right click over top of the highlighted line and select 'Uninstall'.

Double click Programs and Features (or Add / Remove Programs), then locate MS Office in the list.

To uninstall and reinstall MS Office, do the following: If you reinstall Outlook it should find the files again without any issues. Note: if you use Microsoft Outlook, your data files (emails) will remain untouched as they are part of your user account. If the repair didn't work for you, then another way you can try and fix this problem is to uninstall MS Office and reinstall it. If that doesn't work, proceed to Option #2.

Once the wizard completes, try and run MS Office again and activate it like you normally would.

The MS Office installation wizard should now appear.

Click Start, then click on Control Panel.

The easiest way to fix this problem is to repair MS Office. Option #1: Repair MS Office using Control Panel

The reason you're receiving this error message is because a configuration file or part of the MS Office binaries are corrupt / out of sync which is most likely the result of the rollback.įrom what I read online there are two ways that you can go about fixing this issue, though the third method (which I will also describe below) is the one that fixed it for me. I did have this exact same problem a few months back with another user. I chose the option to activate on line (or by phone), but then all I get after that is a message that MS Office could not be activated because the product key is invalid. However, now whenever I try to open MS Office it starts up with a message that it is configuring MS Office, then says 'MS Office requires validation'. I recently had to rollback Windows 7 because the system appeared to be corrupt.

Microsoft office 2016 will not activate