title: Flutter Doctor in Windows Power Shell returns error
body: <p>Do you have any idea how to fix this? The Windows Power Shell returns the following when I type in "flutter doctor": </p>
  
  <blockquote>
    <p>`The term 'flutter' is not recognized as the name of a cmdlet,
    function, script file, or operable program.</p>
    
    <p>Check the spelling of the
    name, or if a path was included, verify that the path is correct and
    try again. At line:1 char:1 + flutter doctor + ~~~~~~~     +
    CategoryInfo          : ObjectNotFound: (flutter:String) [],</p>
    
    <p>CommandNotFoundException     + FullyQualifiedErrorId :
    CommandNotFoundException`</p>
  </blockquote>