Hiren’s BootCD is a versatile, all-in-one bootable recovery toolkit used by IT professionals and technicians for troubleshooting, diagnosing, and repairing computer issues. It contains a wide range of free and legal utilities for tasks such as data recovery, virus scanning, password resetting, disk cloning, partition management, and hardware testing. Originally based on DOS, newer versions like Hiren’s BootCD PE (Preinstallation Environment) are built on Windows 10 PE, offering a modern graphical interface and support for newer hardware. It's especially useful for fixing unbootable systems or performing maintenance tasks without needing to boot into the primary operating system. Hiren’s BootCD is widely regarded as an essential tool in a technician’s toolkit due to its portability and powerful collection of diagnostic utilities.