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Upgrade to Windows 8 - Microsoft Windows
Get answers to questions about upgrading to Windows 8, including system requirements, how to purchase, and what files, settings, and apps you can keep.
Upgrade to Windows 8 with only a product key - Microsoft Windows
Learn how to download and install Windows 8 in a few steps by using just a product key.
Windows 8 Upgrade Assistant and Windows 8 Setup privacy statement
Read the Windows 8 Setup privacy statement.
Upgrade Assistant: See if your PC can run Windows 8 - Microsoft Windows
See how to use the Windows 8 Upgrade Assistant—it’s free—to find out if your PC can run Windows 8. You’ll also get a free compatibility report.
How to perform a clean install of Windows 8 - Microsoft Windows Help
Learn how to perform a clean installation of Windows 8 using Windows upgrade media.