Managing VM checkpoints
With Hyper-V in Server 2022, a checkpoint captures the state of a VM into a restore point. Hyper-V then enables you to roll back a VM to a checkpoint. Windows Server 2008's version of Hyper-V provided this feature. With Server 2008, these restore points were called snapshots.
With Server 2012, Microsoft changed the name to checkpoint. This change of terminology was then consistent with System Center and avoided confusion with respect to the Volume Shadow Copy Service (VSS) snapshots used by many backup systems. While the Hyper-V team did change the terminology, some of the cmdlet names remain unchanged. For instance, to restore a VM to a checkpoint, you use the Restore-VMSnapshot cmdlet.
When you create a checkpoint, Hyper-V temporarily pauses the VM. Hyper-V creates a new differencing disk (AVHD). Hyper-V then resumes the VM, which writes all data to the differencing disk. You can create a variety of checkpoints for a VM.
Checkpoints are excellent...
