If you use a toolbar such as the Google or Yahoo toolbars, you probably won't want to see the built-in search box in Internet Explorer 7. There's a quick registry fix that you can do to enable / disable this.

This registry fix works by adding in the DWORD value NoSearchBox, with the value set to 1, to the following registry key:

HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet Explorer\Infodelivery\Restrictions

Hide Search Box

Download Hide Search Box Registry Fix

Show Search Box

Download Show Search Box Registry Fix

This should work for IE7 on Windows Vista as well as on Windows XP.