“Use the ‘Xtool’ or ‘GDX2’ installer option if available. If not, run setup.exe with ‘-nosandbox’ parameter via CMD.”

After successfully installing, run sfc /scannow in CMD (admin) – frequent unarc errors can indicate a failing storage drive.

High-core-count or high-heat CPUs (like modern Intel/AMD chips) can trigger this error during intense decompression.

Sometimes the error isn't the game, but a corrupted Windows system file.