Wipe It Off - Free Edition

Wipe It Off - Free Edition is an application which prevents any unauthorized changes to your home page and bookmarks.

One of the most appreciated features is the "Hide All IE Windows" hot key.
Whether you just need to leave your desk for a few minutes, or someone enters the room, you can easily and instantly hide every single Internet Explorer window with just a key stroke. This means all the windows are still there but they are invisible.