Create a story about a (like Windows 95 or OS/2 Warp).

Unlike a standard software simulator, a virtual machine (VM) provides a high-fidelity "simulation" because it executes the actual binary code of the operating system.

Scenario: Your only domain controller crashed. You have a backup from 3 days ago. Command to practice in the simulator: ntdsutil -> activate instance ntds -> authoritative restore -> restore database Goal: Understand why USN rollback breaks the world.