RAR archive of BIOS firmware for the S451LB, a VivoBook S451 variant, though the name gives no brand, version or board revision. The 3.25 MB archive should contain a full SPI image. Technicians write such dumps to the BIOS chip with an external programmer when a board does not boot after a failed update. Before flashing, compare the image size with the flash capacity, confirm the board revision printed on the PCB, and save a backup of the original chip contents to keep serial data.
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 →