An archive of repair files for MSI hardware (board MS-19C19). Shared as “V8-MS19C19-LF1V009_checksum4E07_20101228.zip” — a .zip file, 1008 KB.
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 @led_software. 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