RAR archive of 2.27 MB named PIH61T, a short code that gives no clear brand, revision or content description. The H61 in the name likely refers to the Intel H61 chipset, but the board maker cannot be confirmed from the name alone. The size fits a BIOS image for a desktop board, so open it and verify what is inside. Before programming any SPI flash, save the existing contents, check the chip capacity against the file and match the board markings.
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 @laptopschematics. 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)