Are you getting a specific during extraction (e.g., "CRC failed," "Unexpected end of archive")? Are you using Windows or a different operating system ? This will help me give you a more specific fix!
Ensure you scan the extracted files with antivirus software, especially if the source was not an official distribution platform, to protect against malware. aliens-vs-predator-v1-0-0-0-part1-rar
If the source provided a CRC32 or MD5 hash, use a utility tool to check file integrity. Are you getting a specific during extraction (e