Hi I have Installed 4 OS as explained in the DDS10 manual. Deteails are: hd1 Part1 WinXP Pro hd1 part2 Win2000Pro hd2 part1 WinXP Pro hd2 part2 Win2000Server I had DDS 10 and TI9 in the hd1 part1 WinXP Pro. The OS selector10 worked well, until I restored the image back to hd1part1, which was taken before I installed DDS10 and TI9. (previously I had DDS9 and TI8]. Now It has only the first OS (hd1 part1) in the OS list. I tried all the method expalined in the DDS10 manual to add OS manually. It did not work. What I thought, When a OS is instaaled on a separate partition, all the details (boot file, boot sector details,.... ) reside in the partiton. So whenever I install OS selector, it will automatically find the OS. Could u please explain actually what happen, how can add those three OS and how can I avoid this problem in the future.