Follow these steps in order, from the easiest fixes to the more advanced ones.
Rarely, your Windows unarc.dll might be missing or corrupted.
Fix:
If the archive is actually corrupted, no settings change will fix it. This often happens with unstable internet connections during download.
Antivirus software often flags cracked game files as malware and deletes or quarantines specific files during the decompression process, causing Error Code 14. how to fix unarc.dll returned an error code 14
Believe it or not, a buggy version of WinRAR or 7-Zip can cause this error. WinRAR versions older than 5.70 are notorious for mishandling large dictionaries.
Solutions:
Extract or install directly to a root folder (e.g., D:\Games\) instead of Desktop or C:\Program Files. Avoid spaces and special characters in the path.
Antivirus software (especially Windows Defender) sometimes detects cracked game files as "trojans" (false positives) and locks the archive, preventing unarc.dll from reading it. Follow these steps in order, from the easiest