You administer a computer that has Windows 7 and Internet Explorer 8 installed. You discover that two users have installed a new toolbar into their browsers. The toolbar is using an unapproved search engine.
You need to prevent the users from using the unapproved search engine What should you do?

A.
From programs and features in the control panel , uninstall the toolbar

B.
From Internet Explorer, delete the browsing history and locally stored files

C.
Start Internet Explorer in an InPrivate Browsing session

D.
From an elevated command prompt , run %systemdrive%\program files\Internet explorer\iecleanup.exe