Windows installer for WinZip, version 27 judging by the name, 2.79 MB in size. It is not a schematic or firmware file but a compression utility. Repair archives such as boardview, schematic and BIOS packs arrive as zip or rar files, and an archiver like this, or alternatives such as 7-Zip, is needed to extract them before the layout viewer or flash programmer software can open their contents. Check that any installer comes from a trusted source before running 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 @oficinacomputadores. Enginerys does not host this file.