Activate Windows 10 with a Windows 7 product key from another computer
13th July, 2016
Microsoft stopped free upgrades from Windows 7 to Windows 10, but if instead you perform a clean install of Windows 10 you can still activate it for free with a Windows 7 key code.
I've noticed with Windows 10 upgrades that the Windows 7 code you use to activate Windows 10 does not need to belong to the computer you are upgrading. This means you can use the key code from a broken Windows 7 computer to activate Windows 10 on a completely different computer. It's time to drag out your old broken Windows 7 computers and put their product keys to use.
Normally you can't transfer an OEM Windows 7 license to a different machine to install Windows 7, but Microsoft seem to be ignoring this for Windows 10 upgrades.
If you' have built a new computer and have a non-working Windows 7 computer, you can clean-install Windows 10 on the new machine and activate it using the Windows 7 key from the broken machine.
Head on over to the Windows 10 download page and follow the instructions under Using the media creation tool / Perform a clean installation. This creates a DVD or USB drive to install Windows 10.
Install Windows 10 on your target machine and skip the option to enter a product key during install.
When Windows restarts after installation, choose to activate Windows and enter the product key from your broken computer. Windows should activate successfully.