RAR archive of about 2.12 MB holding BIOS firmware for a P8H61-M LX3 motherboard, revision 1.00; the extra (1) in the name suggests a duplicate copy of the same package rather than a different build. Compare its contents with the other copy before choosing one. A dump like this is written to the board's SPI flash chip using a programmer such as a CH341A when the existing firmware is damaged. Verify the PCB revision, back up the current chip, and make sure the file size equals the chip 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 @afsbiosfree. 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 →