Corrupted runtimes can cause Unarc.dll to return error -6.
The archive didn’t extract to his drive. It extracted over it. Files appeared that had no names. Icons that weren’t icons—more like wounds in the interface, bleeding static. A single folder materialized: isdonedll unarcdll error code 6 exclusive
If you downloaded via torrent, have your client force-recheck the files to identify and re-download corrupted pieces. This applies even if you downloaded from direct links, as file corruption can occur during download. Corrupted runtimes can cause Unarc