Given this information, here's a methodical account:
rem Change to the folder that holds the parts
cd C:\path\to\archive
rem Extract to the current directory
unrar x filename.part01.rar
After extraction:
# Example on Linux/macOS
sha256sum extracted_file.ext
| Problem | Likely cause | Fix |
|---------|--------------|-----|
| “CRC error” or “Corrupt archive” | One or more parts are damaged or incomplete. | Re‑download the problematic part(s). Verify the source’s integrity (checksums, MD5/SHA1 if provided). |
| “File not found” for part XX | The sequence is broken (e.g., missing part05.rar). | Ensure every part from part01 through the highest number is present. |
| Extraction stops halfway | Disk space ran out or a part is corrupted. | Free up space and re‑run the test command (unrar t). |
| File names look garbled | The archive was created with a different character set. | In WinRAR, go to Options → Settings → Paths and adjust the “Default charset for filenames”. In 7‑Zip, use the -mcp switch. |
| Password‑protected archive | The creator added encryption. | You’ll need the correct password; without it the extraction cannot proceed. | FC2-PPV-4434335.part11.rar