Installation of Oracle VM Virtual Box and importing the sage ova file in it was not a problem. But when I started the sage machine Blue Screen of Death (DRIVER_VERIFIER_DETECTED_VIOLATION) happened. Otherwise my machine works fine except when I try to start Sage in virtual box. I was using Sage-6.7 ova file and Virtual Box 4.3.28.100309-win. OS, drivers, BIOS everything is up to date. Hard disk health is good. No issue of Virus or malware. Any help will be appreciated.