You cannot install modern .NET versions without SP1.
| Error Code | Cause | Solution | | :--- | :--- | :--- | | | Missing source files for .NET 3.5. | Use DISM: dism /online /enable-feature /featurename:netfx3 /all /source:D:\sources\sxs (replace D: with Windows 7 DVD/USB drive letter). | | 0x800713ec | SHA-2 updates missing. | Manually download KB4490628 and KB4474419 from Microsoft Update Catalog. Install KB4474419 first , then restart. | | Installation hangs at 99% | Corrupt .NET cache or pending Windows Updates. | Run net stop wuauserv , delete C:\Windows\SoftwareDistribution , restart service, then retry. | net framework windows 7
The most important thing to understand is the distinction between the and the modern .NET (Core) versions. You cannot install modern
For the latest compatible version (4.8), you must download the offline installer (a web installer will likely fail due to TLS issues or deprecated certificate roots on Windows 7). Before installing 4.8, ensure Windows 7 has Service Pack 1 installed. | | 0x800713ec | SHA-2 updates missing
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