Migrating laptop harddisk

Hi all,

Have got two Dell latitude C600 laptop, same specs except the processor which is of different speed. Wanted to move one of the W2K Professional configured harddisk to the other C600 laptop with a different processor. When booting up, it show’s inaccessible boot device. anyway to resolve it??

Tried doing the same (moving harddisk from one laptop to the other) on laptop with exactly the same specs with no problem.

Anyone could help????

Puzzled