You cannot use part03.rar by itself. You must download part01.rar , part02.rar , and any other subsequent parts from the exact same source.
Right-click on (always start with the first part). Select "Extract Here" or "Extract to [Folder Name]" . Download MS338 PA671 1366x768 INVES part03 rar
The extraction software will automatically read parts 02, 03, and so on to assemble the full file. You cannot use part03
Download and install a legitimate extraction tool like WinRAR or 7-Zip . Download MS338 PA671 1366x768 INVES part03 rar