Dmiedit Download [portable]

Designed to run inside a lightweight, bootable DOS environment (FreeDOS/MS-DOS). This is the safest method for legacy systems.

sudo dmiedit -s bios-version "Custom-BIOS-v2.0" dmiedit download

Or from GitHub (if available). Replace 3.5 with the latest version. Designed to run inside a lightweight, bootable DOS

or specifically:

If you encounter a "dmiedit: command not found" after compiling, make sure you are in the source directory or have installed it to your PATH . If your system doesn’t support DMI writing at all, consider using virtualization or a different hardware platform. Designed to run inside a lightweight

Many consumer motherboards feature a hardware lock to protect the flash memory. Enter your BIOS menu during startup and disable options labeled BIOS Flash Protection , Secure Boot , or SMM Security Mitigation .