file, use the following methods. This file is typically located on your installation media in the \sources\sxs Server Fault Method 1: Using DISM (Command Prompt)
reg query "HKLM\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5" /v Install # Should return: 0x1
Even with a new CAB, you might see errors. Here’s how to fix them.
Value 0x1 = installed.
Avoid downloading individual .cab files from untrusted, third-party file-sharing blogs. These files can contain malware or cause fatal deployment mismatches. Use the following official methods to acquire a clean copy: 1. Extract from the Original ISO Media
Understanding the microsoft-windows-netfx3-ondemand-package.cab File
This is a more permanent and manageable solution. file, use the following methods
You are in the right place.
Ensure the ISO or .cab file you are using matches the exact version of Windows Server 2012 R2 you have installed.
This .cab file is not a standalone executable; it is designed to be serviced into the operating system by the tool, which we'll explore in detail. Value 0x1 = installed
dism /online /enable-feature /featurename:NetFX3 /all /source:D:\sources\sxs /LimitAccess Use code with caution. : Targets the currently running operating system.
: If your server is managed by WSUS, you may need to temporarily bypass it via registry or Group Policy to allow the feature to enable. Experts Exchange
Copy this file directly to a temporary directory on your target machine (e.g., C:\NetFx3\ ). 2. Download from the Microsoft Evaluation Center Use the following official methods to acquire a