My question is this, do only certain keys work for certain releases of win 2k? The reason I ask this is becuase I just bought a COA, and it looks legit, hologram and all, reads windows 2000 professional 1-2 CPUS, the product key, and then the hologram of MICROSOFT. But when I tried to install a fresh installation off my copied cd (sp1) it says invalid key... Did i get duped or is there a chance this is a legit COA and it works with a later release of Win2k?