Archive for MSI board MS-7156, compressed with RAR and 1.44 MB in size. The name identifies the board but not the contents, so open it with WinRAR or 7-Zip to see whether it holds firmware, a schematic or other files. MS-7xxx numbers belong to MSI desktop motherboards and are silkscreened on the PCB. Confirm the number and revision first; documentation assists with tracing rails and test points, and any BIOS image should only be programmed after backing up 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.