Archive covering MSI board MS-7171, compressed as RAR and sized at 3.79 MB. The name is limited to brand and board number, so the files inside need to be checked after unpacking with any standard archiver. MSI applies MS-7xxx codes to desktop motherboards, printing them on the PCB with a revision. Match those markings before trusting the material; diagrams help with tracing signals and shorts, and any firmware should only be written after the existing chip has been read out and stored.
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.