From two days ago, I want to go to "Tools", then "Internet Options" and suddenly I am blocked and can't! The error popup box message is "This operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator." I have to click on "OK" in order to close the box and do something else.
What happened? I want to be able to get to that Internet Options page...

What happened? I want to be able to get to that Internet Options page...