With Windows XP, if you click and drag the ‘My Computer’ icon on the desktop up to the top of the screen and release, it creates a ‘My Computer’ toolbar that provides easy access to My Computer icons such as C:\; My Documents and the Control Panel. If your desktop doesn’t have the My Computer icon, you can also drag it from your Start Menu up to the top and get the same end.

You can also right-click the ‘My Computer’ toolbar and change it’s settings like ‘auto-hide’ and ‘always-on-top’.