Download Net Framework 3.5 Windows 10: 64 Bit Offline Installer

Windows 10 offers an online installer. When you enable .NET 3.5 via "Windows Features," Windows Update downloads the required files. This sounds easy, but it fails frequently due to:

The solution is the offline installer – a standalone .cab or .exe file that contains all the necessary components. You can copy it to a USB drive, use it on multiple PCs, or install without an internet connection.

Before starting, ensure you have the following:

By utilizing the DISM command with a mounted ISO, you can successfully install .NET Framework 3.5 on Windows 10 completely offline, bypassing the need for a stable internet connection or the often problematic Windows Update service.

Download .NET Framework 3.5 Windows 10 64-Bit Offline Installer

The .NET Framework 3.5 is a critical runtime requirement for legacy applications and games built between 2005 and 2011. While Windows 10 comes with .NET Framework 4.x pre-installed, it does not natively support apps designed for versions 1.1 through 3.5.

If you are working in an environment without internet access or frequently encounter errors like 0x800f0906 or 0x800f081f when using the standard Windows Update method, you will need an offline installation strategy. Official Offline Installer Options

Microsoft provides two primary ways to obtain the .NET Framework 3.5 offline:

Standalone Redistributable Package:You can download the full service pack package directly from the Official Microsoft Download Center. This is a "full package" (approx. 231 MB) that does not require an active internet connection during the installation process once downloaded.

Windows 10 Installation Media (Recommended):The most reliable "offline installer" for Windows 10 is actually hidden within your Windows 10 ISO or installation USB. This method is preferred because it ensures the framework version perfectly matches your specific Windows 10 build. How to Install .NET 3.5 Offline via DISM (CMD)

If you have a Windows 10 ISO or USB drive, follow these steps to install the framework without using any data:

Mount the Windows 10 ISO: Right-click your ISO file and select Mount, or insert your Windows 10 USB drive.

Identify the Drive Letter: Note the drive letter of the mounted media (e.g., D: or E:). Windows 10 offers an online installer

Open Command Prompt as Admin: Press the Windows Key, type cmd, right-click it, and select Run as Administrator.

Execute the DISM Command: Type the following command, replacing D: with your actual drive letter:

DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs

Wait for Completion: The process will reach 100% and show "The operation completed successfully".

How to Install .NET Framework 3.5 on Windows 10 Without an Internet Connection

If you've ever tried to install older software on a fresh Windows 10 build, you've likely seen a pop-up demanding .NET Framework 3.5. While Windows usually downloads this automatically, what happens if you're on a restricted network or working offline?

The truth is, Windows 10 already has these files—they just aren't "active." Here is how to install the .NET Framework 3.5 (which includes versions 2.0 and 3.0) using an offline method. The Problem with "Offline Installers"

Many users search for a standalone .exe from Microsoft. While a 3.5 SP1 Full Package exists, it often still tries to reach out to Windows Update during the process. For a truly offline 64-bit installation on Windows 10, the most reliable method is using your original installation media. Step-by-Step: Offline Installation via DISM

The Deployment Image Servicing and Management (DISM) tool is your best friend here. 1. Get Your Windows 10 Media

You need the Windows 10 ISO or a bootable USB drive that matches your current OS version.

If you don't have one, you can use the Media Creation Tool on a connected PC to download the ISO. Right-click the ISO file and select Mount. Note the drive letter assigned (e.g., D: or E:). 2. Run the Command

Open the Command Prompt as Administrator (search "cmd" in the Start menu, right-click, and select "Run as administrator"). The solution is the offline installer – a standalone

Enter the following command, replacing D: with your actual drive letter:

DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs /All: Enables all parent features of .NET 3.5.

/LimitAccess: Prevents DISM from trying to contact Windows Update.

/Source: Points specifically to the sxs (Side-by-Side) folder on your media where the required .cab files live. 3. Verify the Install

Once the progress bar reaches 100%, you can verify it's active:

.NET Framework 3.5 Offline installer for Windows 10 - Microsoft Q&A

To install .NET Framework 3.5 on Windows 10 (64-bit) without an active internet connection, you can use the official Microsoft .NET Framework 3.5 SP1 Full Package or perform a manual installation using local Windows media. Johnson Controls Method 1: Using the Offline Installer

Download the full redistribution package from a computer with internet access and transfer it to your offline machine. dotnetfx35.exe : ~231.5 MB Installation : Run the executable as an Administrator and follow the prompts.

: This package is the most reliable for completely air-gapped systems. Method 2: Using Command Prompt (DISM)

If you have a Windows 10 ISO, DVD, or bootable USB, you can enable the feature directly from the media.

Installing .NET Framework 3.5 on Windows 10 (64-bit) without an active internet connection typically requires using Windows 10 installation media (such as an ISO file or USB drive) or the official Standalone Installer if you can download it beforehand from another machine. Method 1: Using Windows 10 Installation Media (Recommended)

Windows 10 already contains the files needed for .NET 3.5 in its installation media, specifically within the sources\sxs folder. Before starting, ensure you have the following:

Mount your Windows 10 ISO or insert your installation USB drive.

Open This PC and note the drive letter assigned to the media (e.g., D: or E:).

Right-click the Start button and select Command Prompt (Admin) or Windows PowerShell (Admin).

Enter the following command, replacing D: with your actual drive letter:DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs

Wait for the progress bar to reach 100%. Once completed, you will see a "The operation completed successfully" message. Method 2: Official Standalone Installer

If you have access to another computer with internet, you can download the full offline package and transfer it to your offline machine via USB. How To Install .Net Framework 3.5 Offline On Windows 10

This is the most common error. It means the DISM command cannot locate the microsoft-windows-netfx3-ondemand-package.cab file.

Warning: Do not download from third-party "download manager" sites. They often bundle malware or outdated versions. Always use official Microsoft sources.

Yes. They run side-by-side without conflict. In fact, many apps require both.

.NET 3.5 includes CLR 2.0, WinForms, WPF, ASP.NET, and libraries for both x86 and x64. The offline installer contains everything to avoid internet calls.

The methods above work identically for 32-bit (x86) systems, just ensure your source ISO matches your architecture.