Hi, I'm talking about dual booting Vista and Longhorn Server... Both Vista OS's if i may say so. The problem is: Both Vista's assume the partition that it is installed in...as C: drive. In my case, I installed Vista first and that partition is C: drive. Then i installed Longhorn Server and in Vista, where Longhorn Server is installed in is H: drive. Whereas in Longhorn Server it is C: drive. In the Vista bootloader, it boots by drive letter, and therefore since Vista is installed first, C: will boot me into Vista, and it has assigned H: to boot into Longhorn Server. After installing Longhorn Server, I can boot into it and do whatever. Then i boot into Vista, that worked... But if i boot into Longhorn Server again, i cant. It gives me an error such as An error has occurred and some numbers and letters in the bootloader. Therefore 'it' - that is, something has been confused. So now I'm sure how to dual boot both OS's. My questions: - Will it be possible to install Windows Vista and Windows Longhorn Server on the same computer? - How do one setup the bootloader's and partitions to house both of these new gen OS's? - Is it possible to change the drive letter of the partition on which Windows Vista\Longhorn is installed on? Many thanks.