I received no replies to this query previously. I am in the same situation again after a Windows Update today during which I installed IE 10. As an important site became unusable I needed to uninstall IE10. The obvious route was System Restore which completed OK. I assumed that the various critical updates had been removed but they still show as installed in the update history including IE 10. IE 10 has reverted to IE9 in reality. A further Windows Update does not indicate any missing updates but I am worried that they have been removed.
Surface Pro (2017) vs Surface Pro 4