Security is Everyone's Job
Images are files that contain the data of a virtual disk, which can be used to create or restore a virtual machine.
Images can be either generalized or specialized, depending on whether they have been prepared for reuse or not.
Generalized images have been cleaned of any machine-specific configuration, such as the computer name, user accounts, and product keys.
Specialized images retain these settings and are usually used for backup or migration purposes.
Images can be stored in different formats, such as VHD, VMDK, or ISO, depending on the virtualization software or platform that you use.