As long as it is retail contact Microsoft:
http://support.microsoft.com/?kbid=326246

If it is OEM contact the seller, Microsoft can not help with OEM.

--
Jupiter Jones [MVP]
http://www3.telus.net/dandemar/


[quoted text, click to view]
back of CDs and I couldn't find it. I checked on the box at
certificate of Authenticity. What do I have to do?

[quoted text, click to view]
of CDs and I couldn't find it. I checked on the box at certificate of
Authenticity. What do I have to do?

What did you do with the inner box that originally had the CD's in it? There
should be a label on that box with your key on it.
If you cannot find the inner CD box, your only recourse is as provided by
Jupiter.

--
Peter [MVP Academic]