Tyla, there is a way to reprogram or completely remove the (common) functionality of the windows key in XP, I'll see if I can dig up a link for you.
Under Vista I've no idea.
EDIT: Here's what I was looking for -
http://webpages.charter.net/krumsick/
Very old program called KeyTweak. It is simply a remapper. You may be able to coax windows to be able to do it without the need for a 3rd party application, but I'm pretty sure that the windows key is offlimits in the remapper windows provides.
Please note that this program is for basic keyboards, so if you have anything like a G11/15/Cyborg you may experience problems.