Compressed RAR archive of 565 KB for the ECS H61H2-M2 motherboard, revision 1.0. The board is part of the Intel H61 based H61H2 series, with M2 identifying this variant; the enclosed files are not described in the name and are presumably schematic pages. Use them to follow rails from the power connector, check the CPU VRM and memory supply and locate test points during fault finding. Extract with WinRAR or 7-Zip, then verify that the variant and revision printed on the PCB match 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 @IT_SERVICE_WORLD. 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.