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Upload any "RemoveWAT" tool from 2015–2020 to VirusTotal. You will see detection rates of 45/60. Why? Because modern antivirus engines classify as "Riskware." Even if the tool works, your AV will flag it as HackTool:Win32/AutoKMS or PUA:Win32/Activator .

WAT, or Windows Activation Technology, is a mechanism designed by Microsoft to verify the authenticity of Windows installations. It checks if the product key provided is genuine and if the installation is not pirated. While this may seem like a reasonable measure to prevent software piracy, it has caused numerous issues for legitimate users.

– Such tools are commonly bundled with malware, rootkits, or backdoors. Even discussing where to find them or how they work could lead readers to harm their systems or data.

To remove WAT and activate Windows XP, you'll need to download a specific tool from MEGA. Here's a step-by-step guide:

Using activators from third-party hosting sites like Mega carries significant risks: Malware Distribution

Technically, "removing WAT" is possible by patching three DLLs and a driver. Ethically, it is a violation of Microsoft's EULA (though irrelevant, as support is dead). Practically, it is dangerous.