Tina R. Stancill:When I go to the Lenova Web site, there is no option for XP Pro as far as I can see.
That site isn't exactly a model of clarify and navigability.
After beginning the configuration of an online order and selecting Vista Business as the operating system, a new section opens up titled Recovery DVD, and the second option is Microsoft Windows XP Professional US English RDVD, with a $0.00 cost associated with it.
What that means is Vista Business is preinstalled on the computer. The XP DVD set is shipped with full instructions for swapping the machine over to XP. Were I bent upon a computer with XP, I might not go that route because it would require a fair amount of fussing to get XP up and running. But that new T400 has so much to offer over the older models that I just might (faster backplane, faster processors, faster cache, support for faster memory, LED backlighting, on and on and on).