I guess there are many others like me who nearly never use the “Break”-key on their keyboard. Today I learned that pressing that WINDOWS key plus the BREAK key opens the System Properties control panel.
A second way to do this would be to hold the ALT key and double click “My Computer” on the desktop.
See a complete list of all shortcuts utilizing the WINDOWS key: http://www.seoconsultants.com/windows/key/
Or the list of all keyboard shortcuts available in Windows XP: http://support.microsoft.com/kb/301583/EN-US/