Unarc.dll Returned An Error Code- -14 -

In essence, the error means the installer tried to decompress a file, but the operation failed because it ran out of usable memory or because the data it tried to read was complete gibberish (corruption).

If the error persists, your download is likely corrupt. Repack groups usually provide .sfv or .md5 checksum files. Unarc.dll returned an error code- -14