BIOS for the ASUS Z170-A desktop motherboard, an Intel Z170 chipset board, with 1.03 in the name, likely the version, and marked as OK. The RAR archive is 7.46 MB. A technician uses such an image to recover a board that fails POST, writing it to the SPI chip with a programmer. A sister file in this index carries 1.04 and a larger size, so check which suits your chip. Back up the original contents and confirm the image size matches the flash capacity.
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 →