: Windows Vista through Windows 10 (and some versions of Windows 11).

Microsoft Toolkit is not an official Microsoft product. Instead, it is a collection of utilities originally designed to help system administrators manage volume licensing editions of Windows and Office. However, over time, malicious actors have modified and redistributed it as an "activator" – exploiting known activation mechanisms (like Key Management Service or KMS emulation) to trick Microsoft software into thinking it has a valid license.