RAR archive, 2.50 MB, carrying files for MSI board MS-7159. The name does not describe the contents, so unpack it with any archive utility and inspect what is inside. MS-7 codes are how MSI numbers its desktop motherboards, and the same code is printed on the PCB. Verify it together with the revision before working from the material. Circuit diagrams help locate components and trace shorts, and any BIOS dump should be written only after saving the original chip.
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 @IT_SERVICE_WORLD. 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.
7-ZipWinRARThe Unarchiver (macOS)