If you cannot afford a Windows license and do not want a watermark, consider Linux. Distributions like or Zorin OS are designed to look and feel like Windows. They are free, secure, and run faster than Windows 8.1 on old hardware.
There is no such thing as a safe, cracked KMS activator. The people uploading those files aren't philanthropists trying to help you save $20. They are cybercriminals counting on your desire for a free lunch.
While KMS Activator is a popular tool for activating Windows 8.1 Pro Build 9600, there are some risks and precautions to consider:
