: A restart is highly recommended to ensure all changes are fully integrated.
The progress bar appeared. 0%. 1%. 2%.
The microsoft-windows-netfx3-ondemand-package.cab file is the offline installer for , which is often required by older software on Windows 10, 11, and Windows Server.
DISM is looking for the files but cannot match the specific version of the CAB to your version of Windows. Download Microsoft-windows-netfx3-ondemand-package.cab
: Right-click the downloaded ISO file and select Mount . It will appear as a new drive letter (e.g., D: or E: ).
This usually happens when the computer is trying to reach Windows Update but is blocked by a firewall or group policy. Using the /LimitAccess flag in the command above typically bypasses this issue.
He hit Enter. The cursor blinked. And blinked. : A restart is highly recommended to ensure
He clicked Download .
The Microsoft-windows-netfx3-ondemand-package.cab contains all the raw binaries, drivers, and assemblies needed to cleanly install .NET Framework 3.5 on Windows.
DISM will verify the package and start installation. You will see: DISM is looking for the files but cannot
When environments lack internet access or block Windows Update (often due to strict WSUS or group policy settings), enabling .NET 3.5 via the standard control panel fails. This comprehensive guide provides step-by-step instructions to safely locate, extract, and deploy this CAB package using the Deployment Image Servicing and Management (DISM) tool. Why You Need the netfx3-ondemand-package.cab File
To ensure system security, you should avoid downloading standalone .cab files from third-party websites, as they may contain malware. Instead, extract the official package directly from Microsoft sources.
Alternative Deployment Option: If you mounted a Windows ISO directly and it is assigned to drive letter D: , you can point DISM straight to the drive without moving files:
Cannot install/update .net 3.5 for Windows 10 - Microsoft Q&A
The microsoft-windows-netfx3-ondemand-package.cab provides the solution. It acts as a , allowing you to install the framework completely offline and bypass Windows Update, WSUS, and common network issues.