Get-ChildItem 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full' | Get-ItemPropertyValue -Name Release Output 378389 or higher indicates success. Launch an application requiring .NET 4.5 (e.g., older version of Visual Studio, SQL Server Management Studio 2012). No error about missing framework confirms correct installation. 6. Troubleshooting Common Issues | Error | Cause | Solution | |-------|-------|----------| | “This product is already installed” | Newer .NET version present | Uninstall newer version (not recommended) or use application config to support newer runtime. | | “Installation failed with error 0x80070643” | Corrupt MSI cache or pending reboots | Run sfc /scannow , reboot, then reinstall. | | “This version is not compatible with Windows 10” | Wrong installer (e.g., for Windows 7) | Use .NET 4.5.2 offline installer (KB2901907). | | “Blocked by group policy” | IT restrictions | Deploy via allowed software installation methods. | 6.1 Forcing an Application to Use .NET 4.5 Instead of 4.8 Create or modify <appname>.exe.config :
