stands for American Megatrends Inc. BIOS Configuration Program . It is an official utility designed for manufacturers and developers to modify the Aptio firmware (the modern version of BIOS/UEFI).
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Save the modified file. You will then need to flash this modified BIOS using a tool like AFUDOS or a hardware programmer. Where to Find AMIBCP 4.53 Free stands for American Megatrends Inc