I would like to install a Virtural Box on Windows 10 Professional. Within Virtural Box I need to install Windows 7 so I can continue to
use Lotus 1-2-3 which will not run on Windows 10.
I have a valid product key for Windows 7 Professional. When I enter the product key at https://www.microsoft.com/en-us/software-download/windows7 I recieve a message the product key is not valid.
How can I obtain a legal copy of Windows 7?