When converting logical drives into primary ones, within the limits of Windows of course, the letter assignment of Windows, XP as well of 2000, has disappeared. The result was, that neither of both started, because needed files could not be found. The reason for the change was just to preserve the assignment when new drives would be added to the computer. (No, Acronis, your FAQ gives wrong information, it is very well possible to install XP on a logical drive). I reckon, that primary drives on disk0 will keep their assignment, whatever. Would there be a method to keep the assignment after conversion?