<http://schema.org/description>
"Anyone who tried to install their upgrade version of Windows 7 to a fresh drive was treated to a cruel wake up call. Not when they installed the OS, not even after they installed all their applications, but when the time came to activate. The deal with upgrade media is simple, an existing, and activated copy of Windows must exist on the hard drive prior to installation, or be prepared to start over."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.maximumpc.com/how-to-use-your-windows-7-upgrade-disk-on-a-fresh-pc/?page=0%2C1>