How To Fix Unarc Dll Returned An Error Code 6 Fifa 13 Exclusive Extra Quality -

Corrupted system files or bad disk sectors can misdirect unarc.dll , causing code -6.

Step-by-step fixes (ordered, try each until resolved)

Ensure you have at least double the required disk space for the installation of FIFA 13.

Windows is blocking the installer from creating new files.

If none of the system fixes work, the installation archive itself is likely broken.