title: Android Studio AVD Manager cannot update system images
body: <p>When I open my AVD Manager from Android Studio (version 2.1 Preview 1), I am presented with a banner on my AVD list which reads:</p>
  
  <p><code>System image update is available       (link:)"Update System Images"</code></p>
  
  <p>When I click on the "Update System Images" link, I am presented with the following mysterious error message:</p>
  
  <pre><code>**Packages Unavailable**
  
   The following packages are not available:
      - Package id system-images;android-MNC;default;x86_64
      - Package id system-images;android-MNC;default;x86
  </code></pre>
  
  <p>I don't know what this means or how to resolve it. Web searches have been fruitless. Any ideas?</p>
  
  <p>Here is what I am seeing:
  <a href="https://i.stack.imgur.com/MNsyY.png"><img src="https://i.stack.imgur.com/MNsyY.png" alt="enter image description here"></a></p>
  
  <p>In response to Zayin, here is what I see when I look for the MNC system images. There doesn't appear to even be an option for installing them.
  <a href="https://i.stack.imgur.com/Y5kqR.png"><img src="https://i.stack.imgur.com/Y5kqR.png" alt="enter image description here"></a></p>