1. It may happen if you restore the partition to other position instead of original position. Please restore the partition to its original position.
2. It may happen if you restore the Windows Operating System installed on a logical partition to another disk. Please restore the logical partition with Windows Operating System installed to its original position.
3. It may happen if you restore or clone the disk containing the Operating System to the destination disk with different interface. (The disk with SCSI interface is more likely to have this problem.) In this situation, you can restore it to the disk with same interface.
4. It may happen if you restore the Operating System to the destination disk with different heads and sector numbers per track. In this situation, you can restore it to the disk with the same disk parameters as the source disk, or please see "Why does it fail to boot after restoring or cloning disk in Windows 8/XP/2003?"
5. It may happen if you move the system partition by partition manager software after backing it up, and then perform the restore operation. In this case, Please delete the partition and try again.