Boardview for the Quanta-built WJ1 mainboard DA0WJ1MB6F0, packed in a 113 KB ZIP; the inner file name tags it as BV, meaning boardview. The DA0 code follows Quanta's numbering, where WJ1 is the project name. Open it in OpenBoardView, FlexBV or a similar tool to view part positions, nets and test points. That makes it quick to locate components named in the matching schematic and to probe suspected shorts. Confirm the code and revision printed on your PCB before relying on it.
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 @cynetitsolution. 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