Ensure you have all the necessary files in the same folder. If the archive is split into two parts, you must have HpHp2.part1.rar and HpHp2.part2.rar .
If any part is missing or named differently (e.g., in a different folder or missing the "part2" suffix), the extraction will fail. HpHp2.part1.rar
Look for the password on the site where you downloaded the file. Ensure you have all the necessary files in the same folder
You need software capable of handling split RAR files. Popular options include: HpHp2.part1.rar