Install Mosaico in Windows
The setup.sh is only necessary to build Mosaico, since it's still in beta.  You don't need it to actually run Mosaico.  Just download a pre-built version here: http://dist.civicrm.org/extension/uk.co.vedaconsulting.mosaico/latest/uk.co.vedaconsulting.mosaico-latest.zip