Empty Temporary Internet Files on Exit - This setting controls whether Internet Explorer should delete all of the temporary Internet files stored during the session when the browser is closed.
Hide Mail Button On ToolBar - Hides Mail button on ToolBar in Internet Explorer. Also, disables Tools->Mail and News.
Remove the Option to Change or Hide Toolbars - By default users are able to select which toolbars are displayed either be right clicking the toolbar itself, or by changing the options from the View menu. This tweak locks the toolbars, removing the ability to change which are displayed.
Disable the Ability to Customize Toolbars - By right clicking on a toolbar you are usually given the option to Customize, which allows you to change which functions are available from the toolbar. This tweak allows you to disable that function.
Disable Expanding Internet Explorer New Menu - Usually when you click on the New menu in Internet Explorer it is expanded to include options like New Window, Message, Post and Internet Call. Using this tweak will stop the menu expanding and therefore only display the "New Window" option.
Disable Caching of Secure Web Pages - This setting controls whether web pages encrypted using Secure Sockets Layer (SSL) should be stored on the hard disk in the temporary Internet cache.
Disable Access to File URLs in Internet Explorer - Normally you can use the Internet Explorer address bar to access standard files and folders. This setting disables that functionality and only allows access to Internet URLs.
Disable MSN Instant Messenger - This restriction is used to disable the ability to run the Microsoft MSN Instant Messenger client.