For maximum safety with proprietary legacy 64-bit applications, install the exact .NET 4.0 redistributable . Do not rely on in-place upgrades. Modern .NET versions are "in-place updates," meaning they overwrite 4.0's registry keys. If your app explicitly checks for version 4.0.30319.1 , it may fail on 4.8.
Microsoft highly recommends upgrading to a supported version, such as .NET Framework 4.8.1 net framework 4.0 redistributable 64 bit
dotNetFx40_Full_x86_x64.exe (Standalone Installer). File Size: Approximately 48.1 MB. here are some troubleshooting steps:
If you encounter issues during installation or while running applications that require the .NET Framework 4.0 Redistributable 64-bit, here are some troubleshooting steps: net framework 4.0 redistributable 64 bit