I just bought a new Dell XPS 8900 that came with Windows 7 Pro 64-bit installed. Part of the deal was a free upgrade to Windows 10 Pro. I received a Windows 10 Pro 64-bit OS CD with this computer that says "Already installed on your computer. Use this disc only to re-install the operating system on a Dell computer. This disc is not for re-installation of programs or drivers." My question is, do I use this disc to install the upgrade or do I do it online from MS? Is there a difference?
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