Windows 10 Activator is a software tool used to bypass Microsoft's activation process and activate Windows 10 operating systems without a valid license key. While Windows 10 typically requires a genuine product key for activation, activators exploit vulnerabilities or use unauthorized methods to activate the OS illegally. Activators often come in the form of standalone programs or scripts that modify system files or registry entries to trick Windows into thinking it's properly licensed. However, it's important to note that using such activators is illegal and unethical, as it violates Microsoft's software license terms. Furthermore, activators may expose users to security risks, malware, or other unwanted consequences. To ensure compliance with licensing agreements and avoid potential risks, users are encouraged to obtain genuine Windows 10 licenses through authorized channels.