Version 21.12 marked a period where MediCat became exceptionally stable and widely adopted in the IT community. By moving away from a monolithic ISO to a modular Ventoy-based system, it empowered users to customize their toolkit. While newer versions have since been released (such as the 2025 edition), v21.12 is often cited in technical forums as the version that perfected the "drag-and-drop" utility of the project.
| Feature | MediCat v21.12 | Hiren’s BootCD PE | Ultimate Boot CD | | --- | --- | --- | --- | | | ~29GB | ~2.5GB | ~700MB | | Portable Windows apps | 150+ | 100+ | 20+ | | Linux live environment | Yes (Porteus) | No (only WinPE) | No | | UEFI Secure Boot support | Partial (needs disabling) | Yes | No | | Password bypass tools | Yes (Kon-Boot, chntpw) | Limited | No | | Pre-configured for gaming/benchmarking | Yes (RetroArch, GPU tools) | No | No | MediCat USB v21.12
(indicated by the version number "21.12"), this version provides a bootable environment to troubleshoot, repair, and recover systems that cannot boot normally. Key Features of MediCat USB v21.12 Ventoy-Based Booting : It utilizes Version 21