BIOS firmware in a 2.94 MB RAR under the short name H81MHG41, with no brand, revision or version stated. The H81 prefix suggests an Intel H81 chipset desktop board, but the exact model must be confirmed from the PCB marking. Technicians use such images to recover a board by reflashing the SPI chip with a programmer. Inspect the archive contents, back up the original chip first, and make sure the image size equals the flash capacity before writing it.
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 →