Chon_ I have found a way... From disk management, you cannot change the boot drive letter. I have done this... (I was on VMware) 1. Create a new machine with 3 Virtual disk 2. started from third drive, create a partition... Became c: 3. Choose second drive, create partition, became d: 4. Choose third drive, created partition became e: and installed XP on this drive. Worked fine. I tested my bug and found the solution Thanks