Besides physically securing your computers,there is little you can do to prevent drive imaging.

Question

Quizplus · Accepted Answer

Drive imaging is a process of creating a bit-by-bit copy of a hard drive. This copy can be used to restore the hard drive in the event of a failure, or to create a backup of the data on the hard drive. Once a drive image has been created, it can be used to restore the hard drive to its original state, even if the original hard drive has been damaged or destroyed.

Besides Physically Securing Your Computers,there Is Little You Can Do