Imagine your favorite car maker goes wild, trumpeting all around the planet with its brand new world-class top-range model, which is supposed to make your life even better, bringing you so many new features that it's going to be the ultimate driver experience.
Now, imagine that a few months after release, this guy offers you to downgrade to the previous generation, because the new one shows some unrecoverable weaknesses in real world conditions.
That's exactly what Lenovo is offering to its customers : downgrading from Windows Vista to Windows XP. See here.
Redmond, you have a problem.