RAR archive of 11.5 MB whose name holds only the board number 212023-1, a pattern that follows Wistron numbering. The name does not state the laptop brand, the model or what the archive contains. It may hold a schematic, a boardview or a firmware dump, so extract it with WinRAR or 7-Zip and look at the files inside. Wistron boards carry this number in the copper or silkscreen, so check that the PCB in hand reads 212023-1 before using any of the material for diagnosis or reflashing.
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 @anztechnology. 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.