Net Framework 4.0 Offline Installer ((free)) May 2026

dotNetFx40_Full_x86_x64.exe /passive | Error Code | Likely Cause | Fix | |------------|--------------|------| | 0x80070643 | Corrupt MSI cache | Run sfc /scannow or reinstall Windows Installer | | 0x80240037 | Prerequisite missing | Install Windows Imaging Component (WIC) or KB971513 | | 0x800c0006 | Wrong installer used (web instead of offline) | Download the standalone .exe from above | Recommendation for Modern Use If you need .NET 4.0 for an old application, consider installing .NET Framework 4.0.3 (latest update for the 4.0 branch) or 4.8 (backward compatible with almost all 4.x code). Use the 4.0 offline installer only in legacy air‑gapped environments where upgrading is not possible.