Why do you have to have something in the history for your parents to see? Seems silly, when browsing the internet is only a small part of what you can possibly do online

You could use the Paranoia options in TweakUI to make Windows wipe several tracks/lists every time to logout/login/reboot and as far as your parents will be concerned, it'll be something Windows just does by itself

Why not install Mozilla/Firefox too - they have better privacy options, and your parents might not know to check such alternate browsers
