You better make haste and not waste time buying a copy of XP. They are about to be pulled off the shelves pretty quick. XP is a great OS, however, MS's recent OS, Vista, is horrible that I had bought a new PC that had it installed and wiped it off my hard disk and put Linux on it. Linux is free, adaptable, configurable, secure, and almost always free. What you can do on Windows you can do on a Linux distro. My favorite is Fedora, and then Ubuntu, both of which I use. I also like Sun Solaris, however, I don't want more than 2 OSes on my machine so I am going to buy a laptop and erase Windows and put Solaris on it.