title: VirtualBox Not Starting after Successful Docker Installation
body: <p>Before starting to learn docker, I have been able to open oracle virtual machine. But after following steps on how to install docker on windows, then switching on hyper-v, docker started working but this has made the virtual machine to stop working so I decided to uninstall docker and switch off hyper-v then restart the system, surprisingly, the VirtualBox is still showing similar error like so:</p>
  
  <pre><code>Call to VidMessageSlotMap failed: Last=0xc000000d/87 (VERR_NEM_VM_CREATE_FAILED).
  
  
  Result Code: 
  E_FAIL (0x80004005)
  Component: 
  ConsoleWrap
  Interface: 
  IConsole {872da645-4a9b-1727-bee2-5585105b9eed}
  </code></pre>
  
  <p>Please how can I fix this?</p>