I am able to start the Sandbox on Windows 10 and Oracle VirtualBox. Initially I also faced same problem, Sanbox was not starting even after setting RAM to 12GB. (waited for more than 1 hour) So I removed the sandbox image from VirtualBox, closed the virtualbox application, used Ccleaner to clean temp files, and restarted windows . After restart I reloaded the sandbox image in VirtualBox and set the RAM to 11111 (close to 11GB). and then closed VirtualBox application, used Ccleaner to clean temp files, and restarted windows again. after that sandbox did work, It did took some time to start up. After that I also tried running it with 10GB RAM but did not worked. Still wonder why it did not worked with 12GB RAM, but worked later with close to 11GB, My suspect is something to do with temp files , May be I am wrong. I am not sure. But give it a try and see if that works for you. ... View more