Zipped boardview package, 288 KB, whose generic name gives no device, brand or board number, so the contents must be opened to learn which motherboard it covers. Boardview files show component placement, part designators, net names and test points on both sides of the PCB, letting a technician find where a rail goes, which parts share a net and where to probe for a short. Depending on the internal format it opens in OpenBoardView, FlexBV or a similar viewer. Confirm that the board number and revision printed on the PCB match the file before trusting any location.
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_software_download. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.