I have a HP branded computer here that I have been trying to activate for Windows 7 Ultimate, First I tried W7 ISO with the activator pre-installed that activates itself once in boot (this didn't work and the computer kept re-booting itself..never even got to the log-in screen) Then I tried installing just W7 without any activators..(this worked) but once I installed the activator and it rebooted to complete activation..it went back to re-booting itself over and over again The HP model of this computer is A1253w, its a older computer that came pre installed with XP Media Center. Any ideas on how to get this thing activated?