9.1 has lots of Bugs . . . and the F11 Secure Zone management software will prevent the system from rebooting after the F11 operation is completed. The system must be shutdown and then rebooted or the system will hang on boot where external USB disks are mounted in the boot sequence. 8.0 did not have this problem. Acronis does not have a clue as to why this is occurring! I hope some developer will put the version 8.0 code in version 9.1. The product should not be used as your only backup software!!!!!! USE CAUTION!!