HP archive for the motherboard DA0P9EMB6D0, revision D, packed as a 13.3 MB ZIP whose exact contents are not spelled out in the name. The DA0 prefix follows the Quanta numbering pattern, so the board is made by Quanta for HP, with the project code sitting inside the number. Such packages usually hold a BIOS dump, schematic or boardview, so open it to see which. Check that the number and revision silkscreened on the PCB match before relying on any file inside, as different revisions can change parts and rails.
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 @azvoltagemap. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.