Nonsense. Microsoft does not deactivate the license for the Windows 7 that Windows 10 was upgraded from. A legal example - make a backup image of Windows 7 using Macrium Reflect. Upgrade the...

There is one way to legally, without violating the EULA, to end up with a dual boot Win7 and Win10 free upgrade. You have to start with 2 Win7 installs that are set up for dual booting and that...

You have to upgrade an installed, activated and running Windows 7/8/8.1 first from within that Windows 7/8/8.1 in order for the upgrade to activate. Then once you have an activated Windows 10 from...