Microsoft appears to have sent an “Official Windows 7 Upgrade chart” to Walt Mossberg of the Wall Street Journal. The chart to many tells a rather confusing story: Upgrading to Windows 7 will be hideously complex.
Windows 7 Upgrade Chart
First, it includes one entire row dedicated to a product that doesn’t exist: Windows Vista Starter 64-bit edition (Vista Starter is available in 32-bit only).
Second, of the 66 separate options listed, many are completely ludicrous. Is anyone going to “upgrade” from 64-bit Vista Business to 32-bit Windows 7 Home Premium?
ZDNet has redone this chart into something that is both accurate and useful. It faithfully includes every option listed in the Microsoft chart, with the errors corrected.
Which one do you prefer?
Additional Read : Windows 7 Upgrade Matrix.