Internet Explorer

Not that I'm aware of, without a third-party utility.

If you're using NT, always lock your workstation.

Otherwise, password-protect your screensaver, then put a shortcut to it on your desktop. You can activate it whenever you walk away, effectively locking your workstation. The only way to bypass it is to reboot, and then you'll know it's been tampered with.

In addition to putting on a screen saver password, add a BIOS password at startup. That will ensure that even if the person reboots, he won't be able to do anything.

On most Win9x machines, you set the BIOS password by going into the Setup. Press either Delete, F1, or CTRL-S at the beginning of the boot (it varies by machine) and there should be options for setting passwords.

Enable Password for content analyzer and do not list any sites as allowed.

Tools->InternetOptions->Content->Enable

U can enable this option when u leave your desk, People with vaild password only can use IE here after.

Hope this helps.