Two commands won't work with drush
Based on this comment https://github.com/drush-ops/drush/issues/58#issuecomment-23716869 it has something to do with your PATH variable. Fix it and the error should go away.


  Added C:\Windows\System32;C:\Windows\SysWOW64 to PATH in Environment
  Variables.  Both errors gone the 'mode' one and the other one about
  console window width.