sfc /scannow and dism /online /cleanup-image /restorehealth are perfectly safe to run. It may be IE11 was removed in some unsupported fashion, or it could be the OS is simply broken. If these do not yield any results then time may be better spent standing up a new one, patch fully and migrate roles / applications over to it.
--please don't forget to upvote
and Accept as answer
if the reply is helpful--