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.NET Framework 3.5 installation could not download the required files

Error code 0x800F0906

Windows could not install .NET Framework 3.5 because the required source files could not be downloaded from Windows Update or the configured repair source.

0x800F0906installation

Observed message

Error code 0x800F0906

Why it happens

  • The computer cannot reach Windows Update or Microsoft Update.
  • Proxy, firewall, or network configuration blocks the required download.
  • The configured local source path is missing the required feature files.

How to fix it

  1. Verify network access to the required Windows update sources.
  2. Review proxy, firewall, or WSUS configuration that may block the download.
  3. If using local media, point the installation source at the correct \sources\sxs location.

Official reference

.NET Framework 3.5 installation errors

Related errors

Can't install the .NET Framework 3.5 without a public Internet environment on an OEM Windows installation.NET Framework 3.5 installation failed on an OEM Windows image without public Internet access0x800F0922.NET Framework 3.5 installation failed with 0x800F09220x800F0907.NET Framework 3.5 installation was blocked by group policy or source configuration0x800f081f.NET Framework installation error 0x800f081f

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.NET Framework 0x800F0906: causes and fixes | Error Atlas