The version string specifically refers to the core release of .NET Framework 4.0 (often designated as version 4.0.30319 in official documentation). Without this package installed, applications built on this architecture will crash immediately upon launching, usually presenting an error code or a pop-up stating that the component is missing. System Requirements for Windows 7
Download the from the official Microsoft website. Run the tool ( NetFxRepairTool.exe ) as an administrator. Download Net Framework 4.0.3019 For Windows 7 64 11 Fix