ASUS H61M-K motherboard archive, 270 KB in RAR format, with no document type stated in the name. The H61M-K is a micro-ATX LGA1155 board on the Intel H61 chipset. Repair packages like this usually contain a boardview that a viewer such as OpenBoardView displays with component outlines, pin nets and test points, useful for locating a shorted capacitor or tracing a missing voltage. Inspect the extracted file and confirm the revision printed on the PCB before working from 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 @boardview. 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.