MSI MS-7540 motherboard material in a ZIP of about 1.51 MB, named with nothing beyond the model code. No revision or file type is given, so look inside before use; the archive could contain a BIOS dump, a boardview or schematic pages. MS-7xxx is the numbering MSI applies to the desktop boards it designs. Match the code and revision on the PCB to the files, and before reprogramming a flash chip save a full read of its original contents. Also make sure the image size matches the chip capacity, or the write will fail.
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.