title: Unable to update Dart SDK. Retrying
body: <p>I am trying to install flutter
  but when I run cmd flutter doctor an error occurred</p>
  
  <p>Checking Dart SDK version...
  'PowerShell.exe' is not recognized as an internal or external command,
  operable program or batch file.
  Error: Unable to update Dart SDK. Retrying...</p>
  
  <p>Waiting for 1 seconds, press <kbd>CTRL</kbd>+<kbd>C</kbd> to quit ...
  Terminate batch job (Y/N)? y
  Thanks</p>