You do not need to extract part 2 separately. Open or right-click the first file in the series (the one ending in .part1.rar ). Extract:
If you cannot install software, tools like ezyZip allow you to upload all parts to extract them in your browser. Troubleshooting Common Errors sc23277-TS2PEv1404051.part2.rar
Right-click part1.rar and select "Extract Here" or "Extract to [Folder Name]" using WinRAR. You do not need to extract part 2 separately