Installing a UNIX Emulator (Windows)
To run PPM on Microsoft Windows, you must have a UNIX emulator such as Cygwin installed. For a list of supported UNIX emulators , see the System Requirements and Compatibility Matrix.
Note: To configure private key authentication with secure shell (see Configuring Private Key Authentication with Secure Shell), you use the ssh-keygen utility, which is part of the Cygwin installation. To get this utility, you must enable the Open SSH components during Cygwin installation.