Board view utility in a 225 KB RAR; the generic name gives no version, author or supported formats, so its exact identity is unclear until unpacked. Programs like this open motherboard layout files, showing part placement and net connectivity so a repair technician can locate test points, follow rails from a connector to a regulator, and narrow down a shorted component. Look for an about box or readme after extracting, scan the files with antivirus, and test the viewer with a known board file.
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 @biosarchive. 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.