Not only Windows 7 but also versions 8.1 and 10 can achieve this.
You can download Windows 11 for free if you own a PC running Windows 10 with compatible hardware. However, purchasing a legitimate license key is essential for building a new computer or using Windows 11 on a virtual machine.
In general, owning a legitimate copy of Windows 11, activated with a license key, will provide you with smooth and stable access to all available features on the operating system. You can purchase Windows 11 from Microsoft or authorized retailers. Alternatively, you can save a considerable amount by using keys from older Windows releases, such as Windows 7, 8.1, or 10.
Interestingly, seven years after the release of Windows 10, old license keys for Windows 7 still allow users to activate the new Windows 11 version without any issues. A genuine Windows 7 DVD could be the answer to the question 'How to download Windows 11 for free'.
You can also purchase such activation keys from other users at a much lower cost compared to the retail price of Windows 11. Just keep in mind that the editions must match—you cannot activate Windows 11 Pro with a key intended for Windows 7 Home.
If you're exploring Windows 11 and running on different operating systems, Microsoft offers official virtual machines for trial experiences. These are freely available and can operate for several months without activation.
The current versions of Microsoft's virtual machines will function without prompting for a license key until February 7, 2023. Following this date, Microsoft will release newer versions, giving users the choice to continue using Windows 11 on virtual machines for free. You can download Windows 11 virtual machines for free from Microsoft's official website.
(Reference: QTM)