Sheep: Since the same start partition is installed at the same time, Win2000 and 2003 is installed at the same time, ... sheep: therefore set the D to the active partition (C disk is first installed in the active partition 2003 ), The CD starts installed Win2000. Flower: Oh sheep: 2000 and 2003 are completely independent. The operating system on different partitions is initiated by switching the active partition (set in disk management). Sheep: It used to use it. Sheep: but it is still inconvenient. Sheep: Go online to search for multiple start software. Flower: When you can't boot, choose. Sheep: The result is a registered BootStar, and when boot, first display the bootstar's boot interface, you can select the operating system on different partitions to start. Flower: That's good SA flower: that re-do C and D cloning. Sheep: Its principle believes is to set the selected partition as an active partition, then start. Only cloned the C drive.