I am now having a problem whereby a setting that was once in the group policy, but no longer is, still seems to be plaguing the machines.
The setting in particular is 'User Config -> Windows Settings -> Internet Explorer Maintenance -> Security ->Security Zones and Content Ratings'
The Content Ratings settings was enabled and the 'Users can see sites that have no rating' unticked. So all users were having issues getting to the majority of websites unless the supervisor password was entered. I have now selected the 'Do not customize Content Ratings' option. About 70% of users seem to be able to browse without being bugged by that box now, but the rest still get it.
I have tried forcing policy updates but this makes no difference.
What am I missing?