Microsoft does not provide a direct standalone "CAB download" link on their public download pages; instead, the file is bundled within the Windows installation media. Install .NET Framework 3.5 on Windows 10 - Microsoft Learn
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 cab file for .net framework 3.5
Now, users can simply check the .NET 3.5 box in Windows Features, and Windows will automatically pull the CAB from your file server without hitting the internet. Microsoft does not provide a direct standalone "CAB
Verify that the \sources\sxs\ folder contains the .cab file. The most reliable fix is an offline installation using the