I have a laptop that has an external CD and FLOPPY Drive. I used the partition I386 copy method to get the windows xp files on the laptop hard drive while connected to my desktop. I did the format C: /s command in order to boot my laptop to reach C Prompt. I have a Sony Vaio PCG-R505TL. When I put the HD back in the laptop I get a NO Operating System message. The Bios says the HD is there; it just wont boot from it. I installed the HD into a different desktop computer and I get the c prompt. This leads me to believe there is an issue within the laptop that wont let the Hard Drive boot to the C prompt. I played with the Bios settings and havent had any luck. I know the laptop HD works on my desktop. Just not my laptop. Any ideas what might be wrong?