You have to remove all of your desktop gadget and remove with this application. Rainmeter.
Screenshot: (see Spoiler)
Interested? Download here
And then check this out:
Download Transparent Theme for Windows 7 and then replace Full Glass application with Black Glass Enhached. I think it is better. (Sorry, I can't give a link :-( )
Make your start button different, use start button changer compatible with your windows version.
Spoiler for Rainmeter
Spoiler for Black Glass Enhanched
Spoiler for Start Menu Changer