clnpwd.exe (Acer Clean Password Utility) is a legacy DOS-based utility specifically designed to reset or clear forgotten BIOS, supervisor, and hard drive passwords on older Acer laptops. Download and Usage Overview
or temporarily disconnect your hard drive to force the system to boot from USB). Run the Utility : At the DOS command prompt, type clnpwd.exe and press Enter. You can then select options to clear the Supervisor passwords. DNO-IT WIKI Modern Alternatives clnpwd.exe clnpwd.exe 64 bit download
For Windows 10 and later:
Create a Bootable USB: Use a tool like Rufus to create a bootable FreeDOS or MS-DOS USB drive. clnpwd