When I try and boot from a DVD Rescue Disk it gets to the point where it shows a command prompt showing various things succeeding and then after it closes the screen flickers and then the computer restarts. I have tried re-burning the ISO, downloading a fresh ISO and burning it, uninstalling Windows PE and reinstalling it, uninstalling and reinstalling Avast Rescue Disk and all of this still produces the same result. However a older Rescue Disk I made around August 28 with the same computer boots and works fine. The system in question is running Windows 8.1 64-bit and Avast's version is 17.6.2310