Sometimes Seagate DiscWizard insists on rebooting, even if you’re cloning between two non-system drives. It is worth checking the state of the target drive. I found that even with no partitions, a target drive with a GPT partition table caused this issue. Solved by firing up diskpart:
list disk
select disk {number}
clean
This wipes the partition table (and consequently the disk appears in the Disk Management console as not initialized). DiscWizard should then clone to it without complaints.