Virtualbox doesn't open - error VERR_VD_IMAGE_READ_ONLY
<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>