Compact 370 KB ZIP archive for the MSI MS-6515. The name carries no revision, version or content type, and at this size it is likely a single document or a BIOS image rather than a large scanned set, though that cannot be confirmed from the name. Unpack and inspect it before use. If it is firmware, confirm the file size matches the flash chip and back up the existing contents first; if a schematic, verify the board code and revision printed on the PCB match.
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.
Built-in OS tools7-Zip