Try this:
For Martin:
Simple solution if you live in North America. Visit below Microsoft
site and follow the instructions. Be sure you photo copy your product
key before returning and also your store receipt and send copies of
the paperwork, keep the orignal paperwork. If you send by UPS you can
pay a small fee and get proof of delivery, not many people know that
UPS does that like the post office. Since you have a dispute over if
or not you have a legal copy I would take that extra step just in case
your return gets ignored.
http://www.microsoft.com/mscorp/productrefund/refund.asp
While waiting for a refund, you can purchase another copy and try a
new key. In an extreme case assuming you purchased with a credit card
you can call your bank the credit card is issued on and dispute the
charges. They will send you form and remove the charges from your
account until the dispute is resolved. Often just the threat of
writing your bank is enough to put the fear of God in vendors that are
dragging their feet issuing refunds. They don't want to get black
listed by either Vista or Master Card.
Ignore clueless trolls like Justin. If you continue to use a copy that
Microsoft for whatever reason views as not genuine you will not be
able to apply online updates and at some future time the Microsoft
update servers that handle critical updates may invalidate your copy
all together so as usual Justin is just blowing smoke out his butt and
doesn't have a clue what he's talking about.