RAR archive for MSI board MS-7053 with no revision stated, 842 KB in size. A separate archive for revision 0A of the same board exists, so compare both and check the revision printed on the PCB before choosing one. MS-7xxx is MSI's in-house desktop motherboard numbering. The contents are not described by the name and should be inspected after extraction. Any BIOS image should match the flash chip size, and the original chip should be backed up with a programmer before writing.
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.