Firmware archive for a board labelled X421FL revision 2.0, with the extra tag GREEN, in a 10.7 MB RAR. X421FL matches ASUS VivoBook naming, though the name does not state the brand, and the meaning of GREEN is not explained, possibly a tested or verified marker. Open the archive to see whether it contains a BIOS image, EC firmware or both before flashing with a programmer. Match the PCB revision to 2.0, back up the original chip, and verify the image size against the chip.
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 @biosarchive. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →