title: Oracle virtual box inaccessible
body: <p>I am using Oracle Virtual Box version 4.2.16 r86992. Everything was fine until yesterday shutdown.
  Today, it shows inaccessible and throws this error:</p>
  
  <pre><code>Runtime error opening C:\Users\xxxxxx\VirtualBox VMs\vBoxxxxXubuntu_Beta\vBoxxxxXubuntu_Beta.vbox for reading: -102 (File not found.).  
  D:\tinderbox\win-4.2\src\VBox\Main\src-server\MachineImpl.cpp[725] (long __cdecl Machine::registeredInit(void)).
  </code></pre>
  
  <p>It's good to restore this to working, It would save lot of time and restore configuration settings and data. Thanking your support.</p>