Hi, I want to buy a Dell system but it comes with Pre installed Windows Vista Home Premium & they do not offer Win XP. I would like to install Win XP Pro SP3 in it and remove Vista. (1) Can I do that & if yes how ? I have Windows XP Pro SP3 CD that came with my another Dell system. (2) How important is it to learn Vista ? I do not like Vista but it looks like sooner or later I am going to have to learn it. Any idea of what percentage of people owning computers now use Vista instead of other Windows OS ? Thanks Much.