Microsoft's official Windows activation methods involve either the customer entering a 25-character product key when prompted, or signing in with their Microsoft account to apply a digital license.

A Windows user was surprised by Microsoft support staff using an unofficial script to 'crack' his Windows install.

If the computer has issues connecting to Microsoft Server, and your keys are fine, it should activate your Windows copy. This post may help you further troubleshoot the Windows Activation States.

Microsoft allows you to install Windows 10 or 11 without a product key. When asked for one during installation, you can simply skip entering it by clicking the "I don't have a product key" option ...

Why do this? Lol Partly because of people like me that would buy $5 windows 7 keys on key reseller sites and use them to activate windows 10/11 on new PCs.

Fix We can’t activate Windows 11/10 on this device because you don’t have a valid license or product key., Error Code 0x803fa067.

Microsoft has confirmed that Windows 7 and 8 keys can no longer activate any Windows 11 edition or version, not just Canary builds, as reported in September. However, Windows 10 keys are still valid.