You can upgrade from Vista to Win7 but not from WinXP. You'll have to do clean install of Win7 later if you go with WinXP now.

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>I am looking at a new notebook (specifically Dell Latitude E6500) that can be delivered with either XP Pro or Vista Business. I think, if I order this notebook, I will go with XP. Will I be able to upgrade to Windows 7 from XP when it is available?
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>Also, someone mentioned multi-OS booting. Is this an option of Vista Business?