If you do not have a product key or if you are having trouble activating Windows using the product key method, you can try activating Windows 8.1 Pro Build 9600 using the Command Prompt.
Microsoft ended mainstream support for Windows 8.1 on January 9, 2018, and extended support ended on January 10, 2023. This means no more security updates or technical support from Microsoft. Activation methods below focus on legitimate keys or built-in recovery options. --- Como Activar Windows 8.1 Pro Build 9600
Since Windows 8.1 is end-of-life, consider upgrading to or Windows 11 (if hardware supports it). Activation is often free if your Windows 8.1 Pro key is genuine: If you do not have a product key
If online activation fails, you can use the Microsoft automated phone system: online & Microsoft Support Product Activation Portal Activation methods below focus on legitimate keys or