Once installed, activate the framework by running the following command in the Command Prompt (as administrator):
: An ISO file or a bootable USB drive matching your current Windows 10 version. Administrator Privileges : You must run commands as an administrator. Microsoft Learn Method 1: Using DISM (Recommended)
Starting with Windows 10, Microsoft stopped including .NET Framework 3.5 as an integrated system component to streamline the operating system. Instead, it's now a "Feature on Demand" that must be manually enabled. While connected to the internet, this is a simple process. However, in scenarios where a PC is in a corporate environment, air-gapped for security, or simply has a poor connection, installing it becomes a major challenge. This is where the .NET Framework 3.5 offline installer for Windows 10 becomes essential.
Ensure your Windows 10 ISO is mounted (assume drive letter E: for this example). Type or paste the following command: powershell Net Framework 3.5 Offline Installer Windows 10 64 Bit
Windows 10 usually downloads .NET Framework 3.5 files through Windows Update. However, an offline installer is necessary if you experience:
The safest and most reliable offline installer is already hidden inside your official Windows 10 installation media (ISO file or bootable USB drive). This method utilizes the deployment files directly from Microsoft. Prerequisites A Windows 10 64-bit ISO file or installation USB drive.
Show you from Microsoft . Explain how to check if .NET 3.5 is already installed . Give you alternative methods if you are on a restricted PC. Once installed, activate the framework by running the
Ideal for isolated workstations, secure corporate networks, or lab environments with strict firewall policies.
. This approach is necessary because the standard standalone installer often fails on modern Windows versions unless the feature is already enabled. Microsoft Learn Prerequisites Windows 10 Installation Media
Dism /online /enable-feature /featurename:NetFX3 /All /Source:X:\sources\sxs /LimitAccess Use code with caution. Breakdown of the Command: Instead, it's now a "Feature on Demand" that
To overcome these challenges, users can install .NET Framework 3.5 offline using the following steps:
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Copy and paste the following Deployment Image Servicing and Management (DISM) command into your Command Prompt window.