RAR archive for the MSI MS-7150 board, 4.77 MB in size. The name gives only the brand and board number, so the exact contents are not stated; such packages usually hold a schematic, a boardview or a BIOS image. MSI uses the MS-7xxx series mainly for desktop motherboards, and the number is silkscreened on the PCB along with a revision. Extract it with WinRAR or 7-Zip, compare the board number and revision with your board, and back up the original BIOS chip before writing anything to 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 @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.