Been using the clone function without a problem for several years. I am now trying to clone a 120 GB drive to a 250 GB drive, and the process works normally using the bootable Rescue Media. However, when I try to boot the new drive it starts and stops and starts and stops in the Windows loading process. (the three blue squares that move across the load window in XP Pro.) I tried several clonings - direct, via USB and the result is the same. I applied "fixmbr" using the XP Pro bootable disk, and that eliminated the stop and go of the three blue squares, But, it kept running squares by about 21-22 times, and then a quick BSOD (too fast even see) and a reboot. To test the process, I ran the clone job on another 120GB drive and it was perfect. So, is there some thing that needs to be adjusted in order to use a larger HDD? A BIOS check shows everything OK in the LBA department, etc, and the drive is correctly ID'd. It shuld not a drive letter problem because the cloned drive carries the same letter as the source drive. Besides, it works for a same size drive, but I think the problem in in the PROPORTIONAL transfer. There is one partition on the drive. BTW - I also tried it using AS IS and not worrying about the unallocated portion of the new drive. I can fix that later ionce the cloned part works.