Use a tool like Rufus to create a bootable FreeDOS or MS-DOS USB flash drive.
Because it is a DOS tool, you must create a bootable environment to use it properly: clnpwd.exe 64 bit download
If you are locked out of your Acer laptop's BIOS, searching for is a common first step toward regaining access. clnpwd.exe is a specialized DOS-based utility primarily used to clear supervisor, user, and HDD passwords on older Acer hardware. What is clnpwd.exe? Use a tool like Rufus to create a