Service archive for the MSI MS-7168 board, 5.77 MB, RAR compressed. The name gives no clue whether a schematic, boardview or BIOS is inside, so extraction with WinRAR or 7-Zip is the first step. MSI uses MS-7 codes for its desktop motherboards, and the number with its revision is silkscreened on the PCB. Check that both match before diagnosing from the files, and when reflashing firmware, read the existing chip with a programmer and keep that backup safe.
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)