I've got a Toshiba Satellite C660-15R that was originally running Windows 7 Home > Upgraded to Windows 7 Pro, then Upgraded to Windows 8 Pro > Upgraded to Windows 8.1 Pro, then Upgraded to Windows 10 Pro (now running the Insider Preview builds).
HP Stream 7 was originally running Windows 8.1 Home > Upgraded to Windows 10 Home.
Nokia Lumia 925 originally running Windows Phone 8 > Upgraded to Windows Phone 8.1, now Upgraded to Windows 10 Mobile Insider Preview.
HP Stream 11 Running Windows 10 Home.
Roland