Run the following command (update the path to where you saved your CAB file):
How to Install .NET Framework 3.5 Offline Using a CAB File If you’ve ever tried to run an older app or game on Windows 10 or 11, you’ve likely hit the "The following feature couldn't be installed: .NET Framework 3.5" error. While Windows usually downloads this automatically, restricted environments or slow internet can make it a headache. The most reliable fix is an offline installation using the .CAB file found on your original Windows installation media. Step 1: Locate Your CAB File
This is the safest method as you are getting the file directly from a Microsoft-signed Windows installation image. The CAB file is located inside the sources\sxs folder of any Windows 10 or Windows 11 ISO file. The filename will be similar to microsoft-windows-netfx3-ondemand-package~31bf3856ad364e35~amd64~~.cab .
Run systeminfo in CMD to check your "System Type," and source the correct corresponding CAB archive. Group Policy Restrictions
: Perfect for air-gapped systems, secure bank servers, and isolated laboratory environments. cab file for .net framework 3.5
Check the box for . 2. Microsoft Endpoint Configuration Manager (SCCM / MECM)
In corporate settings, Group Policy Objects (GPO) may forbid local feature installation. Open gpedit.msc .
Do not download CAB files from third-party websites or untrusted file-sharing forums. These files can be injected with malware or cause system instability.
Locate the policy: .
If you have the Windows 10 or Windows 11 ISO matching your operating system version, you already own the CAB file.
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.Set CabinetNameTemplate=dotnet35.cab .Set DiskDirectoryTemplate=CDROM .Set CompressionType=MSZIP .DotNetFx\dotnetfx35.exe .SP1\windows6.1-kbxxxx.msu .Lang\dotnet-langpack.msi
Save the file as Install_NET35.bat and place it in the same folder as your NetFx3.cab file. Run this batch file as an administrator. Run the following command (update the path to
This usually happens if the version of the Windows ISO does not match the version of Windows installed (e.g., using a Windows 10 Home ISO for Windows 10 Pro). Ensure the ISO matches your Edition (Home/Pro) and Build (e.g., 22H2).
Even with a CAB file, environmental issues can occasionally block deployment. Here is how to fix the most common errors. Error 0x800F081F (Source Files Could Not Be Found)
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Open services.msc , locate Windows Update , right-click it, select Properties , change the startup type to Manual , and click Start . Re-run the DISM command. Error 0x800f081f (Source Files Could Not Be Found) Step 1: Locate Your CAB File This is