I bought winxp pro through my university and the IT rep that sold it to me insisted that it did not need to be activated (as the retail versions do). I noticed that on the CD it says unlicensed software, which leads me to believe it is different the retail version. When I did a format and installed it however, it prompted me for activation. I went ahead and activated it anyway, but emailed the guy back and he still insisted that the version they sell does not require activation unless installed as an upgrade from a previous version, and that I should try doing a clean install again and if that did not fix it I should sent it back to them and they will sent me a new CD on the chance that I was somehow sold the wrong one the first time. A friend who bought it from the same store also reported not having to activate it. Before I send it off and wait for a replacement, I thought I would ask here to see if anyone can confirm that these versions of XP do not require activation. The first time I installed it i booted from the CD, deleted my old partition, and installed winxp from there. It then prompted me for activation. I just finished another install where I deleted the partition, did a quick format, and installed it again, and it again prompted for activation. Is there some special setup procedure I have to go through for this? Do I need to do a zero-fill on the HD or something?