Boardview for MSI boards MS-171C and MS-10371, packed into a small 90.6 KB RAR archive. A boardview is a component placement map: it shows every part, pin and net on the PCB, so you can find test points and follow a signal from one component to the next. Once extracted, the file usually opens in viewers such as OpenBoardView, FlexBV or Boardviewer, depending on the exact format inside. Both numbers follow MSI's in-house numbering, so check the PCB marking to confirm which board you have.
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 @IT_SERVICE_WORLD. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.