I am using Acronis True Image 10. I wanted to make a "shadow/mirror" copy of the hard disk on my IBM Thinkpad T60 to a removable hard drive, in case of primary hard disk failures/problems. I used the "CLONE DISK" feature of the software. I selected the "Auto Mode" feture and proceeded to let the program do "its thing." When I tried to retart my computer I get a "Error Loading Operating system" message upon start up and cannot turn the computer on. I have to hit the F12 kek to get into the Boot Menu. I then have to select "#7: ATA HDD1 HTS721010G9SA00-(S1)" of the three choice showing on the screen. When I exit the computer then proceeds to boot normally. When I am able to start the computer normally, I went went back to the "Clone Disk" feature. I then noticed that the following info appears in the description of the process " ... Note that you have to remove the old hard drive when datat moving is completed." This makes me wonder if by some error by using the "Clone Disk" feature (rather than the "Back-up and Recovery" one)I copied the built-in hard disk contents to the removable one and erased the contents of the built-in disk, since it appears that I can only boot the computer from the removable disk? Is this so? If so, how do I undo this mess I created trying to use your program to simply make a "mirror back-up" of my primary hard drive? Any help you can give would be greatly appreciated. Thanks to anyone who can help with this!