RAR archive of 4.83 MB tied to the board label EM IG116 366B, revision 2.0; the name gives no brand or document type, and the code is not something that can be safely decoded. Open it with 7-Zip or WinRAR to see whether it contains a schematic, boardview or firmware. Whatever is inside, compare the identifier and revision silkscreened on the PCB with the files before using them for tracing rails, locating test points or writing a flash chip.
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 @ShareMan_Electronic_Files. 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.
7-ZipWinRARThe Unarchiver (macOS)