Most versions of this activator are portable executables. This means they do not require a traditional installation process. You run the .exe file, perform the activation, and can then delete the file.
While not a "real" license, a successful activation via KMS often passes the "Genuine" check within Windows. This allows users to download updates from Windows Update without receiving "This copy of Windows is not genuine" notifications. kms auto net activator 1.6.4