Volume three of a multi-part RAR archive containing a Windows 10 Pro image in a single language, described in the name as pre-activated. The piece is 1.00 GB and only extracts together with the other volumes of the set, starting from the part1 executable. Keep all parts in one directory and open the first with WinRAR or 7-Zip. Modified builds like this are not official Microsoft media; scan the contents and check licensing before installing on a customer machine after repair.
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.