The most straightforward and legal way to use Windows 7 or any other operating system is to purchase it directly from Microsoft or authorized retailers.
, the product key might not be accepted, and you may need to try a different OEM key or use Microsoft Phone Activation Trial Extension Windows 7 OEM Brander Activator Release 2 By Orbit30
: Unlike retail keys that require online verification with Microsoft servers, this method allows for permanent offline activation. The most straightforward and legal way to use