Ella Huang MSFT SupportHi Dennis,... That is because some add-ins may affect IE’s normal work. After this resetting, all add-ins and customizations will be deleted. Users basically start with a fresh version of Internet Explorer.Thanks,Ella Huang
Please explain how IE add ins could possibly affect the way it renders a web site. More likely it's the editor tools and the code the editor outputs which are known to be suspect.