title: Cannot run emulator in Android Studio
body: <p>I just got done installing Android studio and trying to take it for a test run.  When I try to run my app I get the following error message</p>
  
  <pre><code>emulator: ERROR: This AVD's configuration is missing a kernel file!!
  emulator: ERROR: ANDROID_SDK_ROOT is undefined
  </code></pre>
  
  <p>Does anybody know how to fix this????</p>