A 3.27 MB ZIP archive for the CIH61MI motherboard, revision V1.1 according to the name. Its contents are not listed, so it could hold a BIOS dump, schematic or other service files. Open it with an archiver such as 7-Zip. The revision matters: files for another PCB revision may not fit, so compare the version printed on the board first. When reflashing the SPI chip, back up the original contents with a programmer and check that the image size matches the flash capacity exactly.
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 @laptopchiplevelrepair. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.