Fourth and last volume of a split RAR set holding a single-language Windows 10 Pro build labelled as pre-activated, 159 MB in size. On its own it cannot be opened; WinRAR or 7-Zip needs every part from part1 onward in the same folder, with the first volume shipped as a self-extracting executable. Technicians use such images to reinstall an operating system after replacing a drive or board, but an unofficial pre-activated build is not a genuine Microsoft release, so verify its integrity and licensing before use.
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.