Open the drive and verify that the path \sources\sxs\ exists. Inside, you should see a file named microsoft-windows-netfx3-ondemand-package~...~.cab .
This error occurs if you try to install an old version over a new one incorrectly. Remember that .NET 4.8 does not replace 2.0. They run side-by-side. Use the DISM method mentioned above to enable the legacy side.
If you are offline and the Windows Features method fails, you may need to use a Windows installation ISO to enable the feature via DISM: Dism /online /enable-feature /featurename:NetFx3 /All /Source:D:\sources\sxs /LimitAccess (Replace D: with your ISO drive letter) . 6. Summary
Windows tried to reach Windows Update even though you used an offline installer. This occurs if the installer was actually the bootstrap web installer. Fix:
The standard Windows Feature installation fails due to corrupted system files or error codes like 0x800F0906 or 0x800F081F . Methods to Install .NET 2.0 and 3.0 Offline net framework 2.0 and 3.0 offline installer
Open the Windows Start Menu, type , right-click Command Prompt , and select Run as administrator .
Only download from or dotnet.microsoft.com . Avoid third-party sites offering "offline installers" — they may contain malware.
Released in 2005, this version brought significant performance improvements over 1.0 and introduced generics, a key feature in modern C#.
Do not run the EXE normally. You will likely get error 0x800F0906. Instead: Open the drive and verify that the path \sources\sxs\ exists
These codes mean Windows cannot find the source files required to complete the installation.
These errors mean Windows cannot find the source files to install the framework.
👉 Download from Microsoft's official site (look for "NDP452-KB2901907-x86-x64-AllOS-ENU.exe" or the latest 3.5 SP1 runtime).
Type or paste the following command into the prompt (replace D: with your actual drive letter): Remember that
This is the most reliable way to install these frameworks on a machine with no internet access
Despite the release of newer versions of the .NET Framework, .NET Framework 2.0 and 3.0 are still widely used today. Some of the reasons why developers and organizations continue to use these versions include:
These errors mean Windows cannot find the source files or lacks permission to access them.