Embedded controller firmware in a zip, named only ec.bin, so the laptop brand, model and board number are not given. The roughly 36 KB size fits a typical EC firmware image from a separate EC flash or controller. EC code controls power buttons, charging, fans and keyboard, so a wrong image can leave a board dead. Identify the EC chip and target board before use, read and save the existing firmware with a programmer, and only write this file when its origin is confirmed.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @vinafix_bios. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →