If the user is a newb internet user you can go into add/remove programs, click the windows components button, and uncheck internet explorer. This "removes" internet explorer. I believe you can still use windows explorer to go to websites, also if you have another browser you can use that. As far as restriction goes:
www.access-control-software.com
http://www.aupaction.com/
http://www.codework.com
These programs would work well.