If you don’t want to save the Office settings, such as Ribbon customizations, or if you are having a problem with settings that you want to fix, select the checkbox.If you want to save Microsoft Office settings, such as Ribbon customizations, do not select the checkbox.
However, you can choose to save the Microsoft Office settings or customizations that you created in the Office programs. The files you created by using Microsoft Office are not deleted.
Repairing Office Click-to-Run requires an Internet connection to be available during the entire repair process. This post talks on how you can repair, update, or uninstall Office Click-to-Run. Sometime back we had blogged Microsoft’s new technology is called Click-to-Run technology, which is a new way to download and install products of Microsoft Office.