Compact 876 KB RAR file for the MSI MS-7135 motherboard. The name gives no revision or BIOS version and does not say what the archive holds. At this size it may contain a single firmware image or a compressed schematic. MSI numbers its desktop boards in the MS-7xxx series, so the code on the PCB is the key reference. Check it along with the revision. If the content is a BIOS, read the original chip first and keep that copy before programming.
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)