: Ensure you have downloaded every volume of the archive. RAR files split into parts cannot be opened individually.
: Often refers to "Main Ware" or "MiddleWare," indicating the system software required for the device to function.
: Likely the hardware model number (WS-1022 or a variation).
: Right-click on part1.rar and select "Extract Here." The software will automatically pull data from part3 and other associated segments to recreate the full file.