But it wasn’t a restore tool. The description read: “Remove user.”

The thread had thousands of replies. “Works like a charm!” “No more activation reminders!” Leo hesitated for only a second before clicking the link. The file was called WAT-Killer.exe .

Leo wasn’t a hacker. He was just a college kid with a broken laptop and a shrinking bank account. His copy of Windows 10 flashed a dreaded message every hour: “This copy of Windows is not genuine.”

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