MSI MS-7252 repair archive, a 5.89 MB ZIP with no revision or file list given in the name. It may contain a schematic, boardview or firmware dump, which should be confirmed after extraction. MS-7xxx is the numbering MSI applies to its in-house desktop motherboards. Technicians use such material to trace power rails, check signal paths from the power button to the chipset and pin down shorts. Compare the PCB revision with the documents, and back up the BIOS chip before flashing.
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 .zip file
Compressed archive that every operating system opens without extra software.