Alaska Joe found this out the hard way with the Vista CD from his action pack.
Which would you do? Go through the hassle and possible failure of the upgrade install, or buy a full version? Either way Microsoft is making out like a bandit.
First the numerous and confusing Vista versions and now this! I feel like MS is at war with its honest customers, because of course real pirates will find ways around all of this. This keeping the honest people honest business is getting tiresome. Just what is activation and WGA for anyway?