I have been trying to clone my existing 120GB HD on my ASUS A8Js laptop with Vista onto a new WD 250GB via an external 2.5" SATA enclosure. The first batch of problems is ATI 10 4942 was very unstable in Vista, I have the laptop shutdown once during the clone process, Hung twice partway and many times that it just reboot and check a few thing and reported that it was finished (within 1 minute) while actually doing nothing. I check the forum here and someone suggested running ATI off a Boot CD, I tried that and it seems to work fine now. You can actually see the process as it clone the hidden, OS and Data partitions. But once done. I swap the drives and try to boot the laptop and it will get stuck on a boot loops right afterthe BIOS but before Windows. I have tried clone from the original HD in the laptop to the 250GB in the external case and I have tried with the original HD in the external case to the 250GB already installed in the laptop. I have also check and make sure that the 250 is wroking fine (at least as an USB storage device by attaching to another PC). I would appreicate any suggestion. TIA.