What is left behind with a Windows XP to Windows 7 upgrade? (Windows.old)?
My understanding is to use Windows 7 upgrade media you must install and activate Windows Vista or Windows XP. In the case of upgrading from Windows XP a "clean install" is performed, but in reading about this, it sounds like this may just be overwriting the Windows XP installation, as it talks about the old Windows being moved to a Windows.old folder. It sounds like the same kind of thing you get when you install Windows over itself, which if you are familiar with that you know it leaves all kinds of junk from the previous installation.
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