Mainstream support ended in 2016. However, security updates are still available via Windows Update. The offline installer remains functional because it does not depend on active support.
Version 4.0 introduced significant architectural improvements that changed how Windows apps function: Microsoft .NET Framework 4 (Standalone Installer) Mainstream support ended in 2016
Bookmark this page for future reference, and get your legacy applications running smoothly today! Version 4
Close all running applications on your desktop. Because the installer modifies system-level registries and directories, open programs can occasionally lock files, prompting an unnecessary system reboot mid-installation. Step 2: Run as Administrator Step 2: Run as Administrator Restart your computer
Restart your computer if prompted to ensure all components are registered correctly. Troubleshooting Common .NET Framework 4.0 Issues
: Roughly 850 MB of free hard disk space for 32-bit (x86) systems, and up to 2 GB for 64-bit (x64) systems to account for temporary installation caching. How to Install .NET Framework 4.0 Using the Standalone File