I have 2 hard drives. I can easily make duplicate copies of windows partitions on my master drive. But when I try to copy one onto my back-up drive I get the following message when I re-boot. "Enter the name of the Command Interpreter (e.g. C\WINDOWS\COMMAND.COM)" I then have to use the bootable Acronis Disk Director to clear/unallocate my back-up drive so that I can access the computer again. To simplify it, I cannot copy windows from my master hard drive to my backup drive using the Disk Director. I know it works because I was able to do it once, and only once. I tried re-format and scandisk on my back-up to clear up anything that might be corrupted. Still no luck.