KMSAuto Net 2015 v1.3.9 Portable by Ratiborus is a widely used, unauthorized utility designed to bypass Microsoft’s licensing verification for Windows and Office by emulating a local Key Management Service (KMS) host. The tool creates a virtual server to trick systems into activating software, but carries significant risks of malware infection and violations of user agreements. More information regarding the risks of this activator can be found on Microsoft Q&A .

Activating software through unauthorized means can lead to stability and compatibility issues. Users might encounter bugs or performance issues not present in legitimately activated software.

Key Management Services (KMS) activation planning - Microsoft Learn