...professional Installation, why? my notebook computer came up with vista installed, I tried installing XP professional on that. First of all I have booted the system from XP installation CD, during first phase of installation, I have opted to format the drive where vista installed and it was done successfully. When computer restarts after first phase of installation, I was seeing windows xp logo, and then immediately computer is shutting down.It would be appreciable if anyone helps in resolving this issue and make my XP installation finish.The CD which I am using is a OEM software pack of Win XP professional which I bought for 160 bucks from one of the online stores. I have used that to install in my friends computer once before. This copy was advertised as "Unlimited installs", thats why I am trying to install in my computer as well. In the worst case even if XP is not genuine, the installation should go fine, and will ask me to activate.Please help meAppropriate answers would be greatly appreciated