title: Virtualbox doesn't open - error VERR_VD_IMAGE_READ_ONLY
body: <p>I had tried to install an OS named Veos with virtual box ,but when I had finished the installation ,I can not open the wirtual machine Veos ,and I had this output:
   Failed to open image 'C:\Users\Takfarinas\VirtualBox VMs\AristaFiles\vEOS-lab-4.16.6M.vmdk' for writing due to wrong permissions (VERR_VD_IMAGE_READ_ONLY).
  Failed to attach driver below us! Image is read-only. (VERR_VD_IMAGE_READ_ONLY).
  PIIX3 cannot attach drive to the Primary Master (VERR_VD_IMAGE_READ_ONLY).</p>
  
  <p>Code d'erreur : 
  E_FAIL (0x80004005)
  Composant : 
  ConsoleWrap
  Interface : 
  IConsole {872da645-4a9b-1727-bee2-5585105b9eed}</p>