title: Eclipse error "ADB server didn't ACK, failed to start daemon"
body: <p>After updating the SDK, Eclipse shows this error:</p>
  
  <blockquote>
    <p>ADB server didn't ACK, failed to start daemon.</p>
  </blockquote>
  
  <p>When I run an Android application, it gives me the following:</p>
  
  <blockquote>
    <p>Please ensure that adb is correctly located at 'D:\android-sdk-windows\platform-tools\adb.exe' and can be executed.</p>
  </blockquote>
  
  <p>How can I fix this problem?</p>