MSI H61M-E23 motherboard BIOS for the B3 revision, packed in a 1.79 MB RAR. H61 is an Intel desktop chipset for LGA1155 processors, and B3 here most likely denotes the board version. A dump like this is typically written straight to the SPI flash with a programmer when the board is stuck after a failed update. Read and save the existing chip first, check the image size equals the chip capacity, and verify the board revision on the PCB before flashing.
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 →