Hi -
Had this with my other pc and now the one i am using now - drove me nuts - i ran the trouble shooter, rebooted and the same error - THEN i paused updates, rebooted my computer , unpaused the updates, it rescanned and all ok !!!!! Might be a fluke but might be of help to people ????
GrahamC123 was the solution that worked for me. After doing so the 2 Realtek drivers with errors show up in the installed drivers along with a 3rd.