If you need to activate Windows 8 legitimately:

Activating Windows without a proper license is against Microsoft’s Terms of Use. Alternative:

All security updates work, no malware, and it never expires.

Please note that using such tools for activation without a valid license is illegal and often considered a security risk.

Key Management Services (KMS) activation planning - Microsoft Learn

If you want, I can instead:

I strongly recommend against downloading or running any "KMS activator." If you need Windows, consider the free legal options above or an open-source OS like Linux Mint.