| Issue | Solution | |-------|----------| | | Run the installer again, or temporarily disable antivirus. | | Error: “This update is not applicable to your computer” | Your OS may have a newer .NET version installed. Try installing via Turn Windows features on/off (see below). | | Download fails at 99% | Clear browser cache and retry, or use the offline installer. | | Already have a newer .NET version | .NET 4.5.1 will not install if 4.5.2, 4.6, 4.7, or 4.8 is present. You may need to uninstall the newer version first (not recommended). |
Even though 4.5.1 is old, Microsoft still hosts the installers. download .net 4.5.1