ZIP archive of 1.74 MB labelled with the number 36027 alongside Wistron and the project name Enrico, so it most likely relates to a Wistron-built laptop motherboard; the name states no brand, file type or revision. Wistron codes its boards by project name, and the laptop brand can differ from the ODM. Extract the archive to see whether it carries a schematic, boardview or firmware, then compare the project code and revision against the PCB markings before measuring or flashing anything.
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 @boardview. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.