Windows 8.1 Pro Build 9600 was the final release version of the operating system. To activate it, you generally have two paths: using a legitimate product key or specialized activation methods. Official Activation Methods

También puedes abrir la consola de comandos (CMD) y escribir slmgr /xpr para ver una ventana emergente que te indicará la fecha exacta de expiración de la licencia o si esta es permanente.

That is a tell-tale sign you used a KMS-based activator. KMS requires a check-in with the activation server every 180 days. The crack you installed may have failed to install the automatic renewal task, or the fake server it relies on is no longer running.

Before you download any random tool claiming to be an "activador" (Spanish for "activator"), let’s break down what this term really means, the serious risks involved, and—most importantly—the safe, legal (and often free) ways to get your system activated.

If your build 9600 shows a watermark or remains unactivated, try these steps: Run the Troubleshooter Start > Settings > Update & Security > Activation and select Troubleshoot to identify specific errors. Command Prompt Reset