title: How to Run windows phone 7.1 Emulator on Windows8
body: <p>I'm having some problems with WindowsPhone 7.1 Emulator on Window 8 CTP; it looks like the emulator has some dependencies from OS version.</p>
  
  <p>When I attempt to deploy it in Visual Studio, I receive the following error:</p>
  
  <p><strong>Error 1   Connection failed because of invalid command-line arguments. 0  0</strong> </p>
  
  <p>I know that the CTP version of Win8 is not the best os for development now, but this question is interesting for me and our user group.</p>
  
  <p><strong>Online help message:</strong></p>
  
  <blockquote>
    <p>Windows Phone Emulator has been blocked from running because it might prevent your computer from starting correctly in the future.</p>
    
    <p>Your version of Windows Phone Emulator isn't compatible with this version of Windows. </p>
    
    <p>For information about possible solutions to this problem, go online to the following Knowledge Base (KB) article:</p>
    
    <p>Click to go online to the Microsoft website for the KB article
    Which version of Windows am I using?</p>
    
    <p>You are using Windows 8.</p>
  </blockquote>