A: Officially, the free upgrade offer ended years ago. However, many users report that using a Windows 7 or 8.1 key still activates Windows 10, though this is not guaranteed by Microsoft.
Before proceeding, you must be aware that
Select (Pro is usually included in the standard image and determined by your product key during installation). Choose your Product language and click Confirm .
: You will still need a valid Windows 8.1 Pro product key to activate the software after installation.