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I want to install Windows 10 (offered for free) on a separate partition (to dual boot), but it is only available for install through windows update if you are running Windows 7 or 8. I can, however, install Windows 10 Insider Preview on a separate partition on my hard drive. If I do this, will I be able to upgrade from the Win 10 Insider Preview to Win 10 (free through windows update)?
The thing to remember is the free Windows 10 update applies only to Windows 7 and 8. So long as you keep that version installed you can update it, not the insider preview, to Windows 10. – snoopen – 2015-06-13T00:35:58.113