Error Code: -1 | Unarc.dll Returned An

If after all steps you still get error -1, your repack is likely corrupted beyond repair or your RAM has hardware errors (run MemTest86).

Error -1 is 99% environmental (RAM, antivirus, path, permissions). Do Step 2 (antivirus) + Step 4 (virtual memory) + Step 6 (short path) and you will likely solve it within 10 minutes. If not, Step 5 (temp folder) and Step 3 (compatibility) close the remaining cases. unarc.dll returned an error code: -1