Removing a HDD password using Hirens Boot CD can be a useful solution for those who have forgotten their password or are no longer able to access their hard drive. Here's a step-by-step guide on how you can remove the HDD password with Hirens Boot CD:

1. Download and burn Hirens Boot CD onto a USB drive or CD.
2. Boot your computer using the Hirens Boot CD.
3. Find and run the password removal tool from the Hirens Boot CD menu.
4. Follow the on-screen instructions to navigate through the process of removing the HDD password.
5. Once the process is complete, restart your computer and access your hard drive without the password protection.

It's important to note that removing a HDD password should only be done on a drive that you own or have permission to access. Additionally, always ensure you have a backup of your data before attempting any password removal processes.