There are two ways to do this:
1) Go to Start/Run, and type Regedit.
Drill down to HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
Highlight 'Main' and look for the value 'Window Title' in the right pane.
Highlight it, and hit delete.
When you delete this value, "Microsoft Internet Explorer" becomes the default window title.
2) The 'miracle cure'...

:
Close Internet Explorer and Outlook Express.
1. Press the Start button.
2. Press Run.
3. Paste in
rundll32.exe iedkcs32.dll,Clear
(This is case sensitive, so better not type it manually)
4. Press OK.
5. Restart Internet Explorer.
This will remove Internet Explorer branding.
Good luck,