Part two of a four-volume RAR set containing Windows 8.1 Pro, 1.00 GB in size. Extraction only works once every volume is in one folder, starting from the part1 executable that opens the set. The result should be installation media that a technician can use for test installs after hardware repair, written to USB with a tool such as Rufus. Any missing or damaged part will stop the process with an error. Use a licensed copy for customer systems.
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)