Upgrading a newer machine from Windows Vista to Windows 7 might mean that you get to see the last few minutes of that DVD on a long flight.
At a demo on Tuesday, Microsoft showed two identical laptops playing the same DVD, with the Windows 7-equipped notebook getting 20 percent better battery life than one running Windows Vista. In general, users can expect newer systems running Windows 7 to offer 10 percent to 20 percent better battery improvement when watching a DVD.
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