Archive for the H81I-PLUS mini-ITX style board, 197 KB in RAR format; no brand, revision or file type is given in the name. The H81 designation points to an Intel H81 chipset desktop platform. Given the size, it probably contains a boardview or schematic rather than BIOS. Unpack it to check the contents, then open the files with a suitable viewer such as OpenBoardView or a PDF reader. Compare the revision silkscreened on your board before using it to trace signals or find a shorted component.
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 @boardview. 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.