Question...what does "XP Upgradable" mean?

[malachont]

If I see a U series notebook product on a retail site listed as having an OS of:
"Windows Vista Business / Windows XP Professional Downgradable"
does this mean it comes with XP? or a DVD enabling me to restore to XP? or just the license to do so and I'd have to order a DVD from Lenovo?

also does anyone have an idea why it seems to me that Lenovo stopped pushing the U330 in favor of newer models, strange as its quite a new model (only a year or so old) is there anything wrong with it? the 450p is newer but slightly heavier about half as fast - cpu-wise. Why would I choose it if I want a fast light machine with a DVDRW drive?

thanks

http://www.laptopsinc.com/_e/Notebooks/ ... tebook.htm

thanks