Mistaken identity (windows 2000pro for XP)

It started with Microsoft trying to get me to download XP specific hot fixes and updates; them my new Belkin V4 Wi-Fi adaptor software thinks I’m running XP with Config Z wi-fi.
Also Microsoft in trying to get me into GENUINE ADVANTAGE adresses me as a XP user!
What gives ??
p.s. I’m using NTFS partitioning.