You're referring to a rather old and somewhat notorious tool in the tech community. The Microsoft Toolkit, specifically version 2.5 Beta 5, was widely known for its capabilities in activating various Microsoft products, including Windows 8.1 and Office, without the need for legitimate licenses.
Customizable Installation: Users can choose specific modules to install, reducing system clutter. How to Use Microsoft Toolkit Safely You're referring to a rather old and somewhat
Disclaimer: Using activation tools violates Microsoft's Terms of Service. This guide is for educational purposes only. Disable Antivirus: Windows Defender or other antivirus software specifically version 2.5 Beta 5
Microsoft Toolkit 2.5 Beta 5: The Official Windows 8.1 and Office Activator including Windows 8.1 and Office