To install .NET Framework 3.5 offline on Windows 10 64-bit , you must use the original Windows 10 installation media (ISO or USB) rather than a standalone installer file, as the standard offline installer package often fails on newer Windows versions without pre-existing components. learn.microsoft.com Method 1: Offline Installation via DISM (Recommended) This method uses the sources\sxs
folder found on your Windows 10 installation media to enable the feature without an internet connection. learn.microsoft.com Prepare Media
: Mount your Windows 10 ISO or insert your installation USB drive. Identify Drive Letter and note the drive letter for the installation media (e.g., Open Command Prompt : Search for in the Start menu, right-click Command Prompt , and select Run as administrator Execute Command : Paste the following command, replacing with your actual drive letter:
DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs : Enables all parent features of .NET 3.5. /LimitAccess
: Prevents the system from attempting to contact Windows Update. : Reboot your computer once the process reaches 100%. learn.microsoft.com Method 2: Using the Offline Installer Package
While Microsoft provides a "Full Package" offline installer, it is primarily designed for older OS versions like Windows XP or Vista and may still trigger a download request on Windows 10. learn.microsoft.com Official Link : You can find the Microsoft .NET Framework 3.5 Service Pack 1 (Full Package) Official Microsoft Download Center Important Note
: If this installer fails or asks for an internet connection, you
use Method 1 (DISM) as the framework files are already technically present in the Windows "Side-by-Side" ( ) folder on your installation media. www.microsoft.com
The .NET Framework 3.5 is a critical piece of software infrastructure required to run thousands of legacy applications on Windows 10. While Windows 10 comes pre-installed with newer versions like .NET 4.8, many older games and enterprise tools specifically demand version 3.5 to function. If you are working in an environment without internet access or need to deploy this across multiple machines, using an offline installer is the most efficient method. Why You Need the Offline Installer
Most users attempt to install .NET 3.5 through the Windows Features menu, which triggers a Windows Update download. However, this often fails due to connectivity issues or specific error codes like 0x800F0906 or 0x800F081F. An offline installer bypasses the need for an active internet connection by using the installation media you already have. Method 1: Using Windows 10 Installation Media (Recommended)
The most reliable "offline installer" is actually tucked away inside your Windows 10 ISO or bootable USB drive. This method uses the Deployment Image Servicing and Management (DISM) tool.
Insert your Windows 10 USB drive or mount the Windows 10 ISO file.
Note the drive letter assigned to the media (e.g., Drive D: or E:).
Open the Start menu, type cmd, right-click it, and select Run as Administrator.
Copy and paste the following command, replacing "D:" with your actual drive letter:Dism /online /enable-feature /featurename:NetFX3 /All /Source:D:\sources\sxs /LimitAccess
Press Enter. The progress bar will reach 100%, and .NET 3.5 will be fully enabled. Method 2: Manual Download from Microsoft
If you do not have the original Windows 10 media, you can download the redistributable package from a machine that has internet and move it to your 64-bit Windows 10 system. Visit the official Microsoft Download Center. Search for ".NET Framework 3.5 Service Pack 1". Download the full package (approximately 231 MB). Transfer the file via USB to your offline Windows 10 PC. Run the installer as an administrator. Troubleshooting Common Errors Error 0x800F0906 or 0x800F081F
These errors usually mean Windows cannot find the source files. Ensure that the path in your DISM command correctly points to the sources\sxs folder on your installation media. Group Policy Restrictions
In some corporate environments, Group Policy may block the installation of optional features. You may need to contact your IT administrator to enable the "Specify settings for optional component installation and component repair" policy in the Local Group Policy Editor. Benefits of .NET Framework 3.5
Backward Compatibility: Essential for software developed between 2005 and 2010.
Stability: Includes the full runtime for versions 2.0 and 3.0 as well.
Security: Even though it is an older version, Microsoft continues to provide security patches for it through Windows 10 updates.
By following these steps, you can successfully install .NET Framework 3.5 on your Windows 10 64-bit system without needing a constant internet connection, ensuring your legacy software runs smoothly and reliably.
Do you have the Windows 10 ISO or a bootable USB ready to use for the DISM method?
To install .NET Framework 3.5 on Windows 10 (64-bit) without an internet connection, you cannot simply use the standard standalone .exe installer, as it often still triggers a download from Windows Update. Instead, the supported offline method requires using the Windows 10 installation media (ISO or USB). Recommended Offline Installation Method
The most reliable way is using the Deployment Image Servicing and Management (DISM) tool via the command line.
Prepare Media: Mount the Windows 10 ISO or insert your installation USB drive. Note the drive letter (e.g., D:).
Open Command Prompt: Search for cmd in the Start menu, right-click it, and select Run as Administrator.
Run DISM Command: Type the following command, replacing D: with your actual drive letter:Dism /online /enable-feature /featurename:NetFx3 /All /Source:D:\sources\sxs /LimitAccess
Verify: Once the progress bar reaches 100%, you can confirm it is enabled by checking Turn Windows features on or off in the Control Panel. Alternative: Standalone Full Package
If you can briefly access the internet to download a large file for later offline use, you can download the Full Package (Service Pack 1) from the Official Microsoft Download Center. File Name: dotnetfx35.exe Size: ~231.5 MB
Note: On modern Windows 10 versions, even this package may sometimes request a connection to "download and install this feature" during setup. The DISM method above is more guaranteed for strictly offline environments. Important Considerations Install .NET Framework 3.5 on Windows 10 - Microsoft Learn
This is the most common error. It means the DISM command cannot locate the microsoft-windows-netfx3-ondemand-package.cab file. To install
\sources\sxs. The folder should contain files like microsoft-windows-netfx3-ondemand-package~31bf3856ad364e35~amd64~~.cab.Prepared for: System Administrators and Advanced Users
Date: Current
Subject: Sourcing and deploying .NET Framework 3.5 (includes 2.0 & 3.0) 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.
Downloading .NET Framework 3.5 on Windows 10 64-bit: A Comprehensive Guide
The .NET Framework is a crucial component of the Windows operating system, enabling developers to build a wide range of applications, from simple desktop tools to complex enterprise-level software. However, some applications require specific versions of the .NET Framework to function properly. In this article, we will focus on downloading and installing .NET Framework 3.5 on Windows 10 64-bit using an offline installer.
Why .NET Framework 3.5 is Still Relevant
Although .NET Framework 3.5 was released in 2007, it remains a vital component for many legacy applications. Some software, especially older games and enterprise applications, rely on this version to run smoothly. Moreover, .NET Framework 3.5 includes several features and libraries that are still used today, such as Windows Presentation Foundation (WPF), Windows Communication Foundation (WCF), and Windows Workflow Foundation (WF).
Challenges with .NET Framework 3.5 on Windows 10
Windows 10, by default, comes with .NET Framework 4.6.1 or later versions pre-installed. However, these newer versions do not include .NET Framework 3.5, which can cause compatibility issues with certain applications. When you try to install an application that requires .NET Framework 3.5, you may encounter an error message indicating that the required version is not installed.
Downloading .NET Framework 3.5 Offline Installer for Windows 10 64-bit
To download .NET Framework 3.5 on Windows 10 64-bit, you need to use an offline installer. The offline installer is a self-extracting executable file that includes all the necessary files for installation. Here are the steps to download and install .NET Framework 3.5 on Windows 10 64-bit:
Installing .NET Framework 3.5 using the Offline Installer
Once you have downloaded the offline installer, follow these steps to install .NET Framework 3.5 on Windows 10 64-bit:
Troubleshooting .NET Framework 3.5 Installation Issues
If you encounter issues during the installation process, here are some troubleshooting steps:
Enabling .NET Framework 3.5 through Windows Features
Alternatively, you can enable .NET Framework 3.5 through Windows Features. Here are the steps:
Conclusion
Downloading and installing .NET Framework 3.5 on Windows 10 64-bit using an offline installer is a straightforward process. By following the steps outlined in this article, you can ensure that your applications run smoothly and without compatibility issues. Additionally, enabling .NET Framework 3.5 through Windows Features provides an alternative method for installation. If you encounter any issues during the installation process, troubleshooting steps can help resolve the problems.
Frequently Asked Questions
Q: What is .NET Framework 3.5? A: .NET Framework 3.5 is a software framework developed by Microsoft that includes a large library of pre-built functionality, APIs, and tools for building Windows applications.
Q: Why do I need .NET Framework 3.5 on Windows 10? A: Some applications, especially legacy applications, require .NET Framework 3.5 to function properly.
Q: Can I install .NET Framework 3.5 on Windows 10 64-bit? A: Yes, you can install .NET Framework 3.5 on Windows 10 64-bit using an offline installer or through Windows Features.
Q: What is the difference between .NET Framework 3.5 and .NET Framework 4.6.1? A: .NET Framework 3.5 and .NET Framework 4.6.1 are two separate versions of the .NET Framework, with different features, libraries, and APIs.
Q: How do I troubleshoot .NET Framework 3.5 installation issues? A: You can troubleshoot .NET Framework 3.5 installation issues by checking system requirements, disabling antivirus software, and running the installer as an administrator.
Once upon a time, in the land of Digitalia, there lived a humble user named Alex. Alex had just acquired a sleek, powerful machine running Windows 10 64-bit. It was fast, it was modern, and it was ready for anything—or so Alex thought.
One afternoon, Alex tried to launch a beloved vintage photo editor. Instead of the familiar splash screen, a cold, grey box appeared: "The following feature is required: .NET Framework 3.5 (includes .NET 2.0 and 3.0)."
Alex clicked "Download and install," but the progress bar didn't move. The internet connection in Alex’s corner of Digitalia was fickle, dropping out just when needed most. "I need an offline installer," Alex whispered, "something I can carry on a thumb drive to save this machine and others."
The quest began. Alex didn't want a "web installer" that would just fail again; the goal was the full package. Chapter 1: The Official Scroll
Alex first visited the Microsoft Download Center. Navigating through the archives, Alex found the Microsoft .NET Framework 3.5 Service Pack 1 (Full Package). It was a hefty 231 MB file—the "Offline Installer." Alex downloaded it on a stable connection at the village library and brought it home.
But when Alex ran it, Windows 10 shook its head. "This app might not work correctly," it warned. On Windows 10, the old installers sometimes struggled with the new OS's security. Chapter 2: The Hidden Power of the ISO
Alex remembered an old wizard's trick. If you have the Windows 10 Installation Media (an ISO file or a USB drive), the .NET 3.5 files are already hidden inside! Check the Source Path: Ensure your path ends
Alex plugged in the Windows 10 USB drive (assigned to drive D:). Alex opened the Command Prompt as Administrator.
With steady fingers, Alex typed the "Spell of Activation":Dism /online /enable-feature /featurename:NetFX3 /All /Source:D:\sources\sxs /LimitAccess
The bars climbed to 100%. The system chimed. The "feature" was enabled without downloading a single byte from the web. Chapter 3: Victory
Alex launched the photo editor. This time, there was no error. The vintage pixels filled the screen, vibrant and sharp. Alex tucked the offline installer and the "Spell of Activation" into a digital vault, ready to help any other traveler stuck in the version-gap of Digitalia.
And the machine lived happily—and compatibly—ever after.
Instead of searching for a random “download net framework 3.5 windows 10 64 bit offline installer” every time, create a toolkit USB:
D:\Net35_Sourcesxs folder from a Windows 10 ISO.@echo off
DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:%~dp0sxs
echo .NET 3.5 installation complete.
pause
Now you have a portable, permanent offline installer.
Downloading the .NET Framework 3.5 offline installer for Windows 10 64-bit is the smartest way to avoid update servers, broken internet connections, and corporate firewalls. While the online method often fails, using Microsoft’s official dotnetfx35.exe or extracting the sxs folder from a Windows 10 ISO guarantees success.
Remember: Always use official sources. Never trust random “.NET Framework 3.5 download” sites. With this guide, you can install the legacy framework once and forget about it – even on dozens of machines.
Next steps: After a successful installation, restart your PC, and your older application should run immediately. If you manage an office network, consider deploying the offline source via Group Policy or SCCM to save hours of IT support.
Have a question not covered here? Leave a comment below or check Microsoft’s official .NET Framework deployment guide.
Article last updated: October 2025 – verified for Windows 10 22H2 (64-bit).
To install .NET Framework 3.5 on Windows 10 (64-bit) without an internet connection, you must use the original Windows 10 installation media (ISO or USB). Windows 10 does not provide a standard standalone executable installer for version 3.5 like it does for newer versions. Official Offline Installation Method (DISM)
This is the only supported way to install .NET 3.5 offline starting with Windows 10.
Mount Installation Media: Insert your Windows 10 USB or right-click your Windows 10 ISO and select Mount.
Identify Drive Letter: Open "This PC" and note the letter of the drive containing the Windows files (e.g., D:).
Run Command Prompt: Search for cmd in the Start menu, right-click Command Prompt, and select Run as administrator.
Execute DISM Command: Type the following command, replacing D: with your actual drive letter, and press Enter:DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs. Alternative: Official Download Links (Online Requirement)
If you can briefly connect to the internet, you can use these official Microsoft links to get the installer package:
Microsoft .NET Framework 3.5 Service Pack 1: A full package that includes subcomponents.
Microsoft .NET Framework 3.5 (Full Package): The complete standalone deployment package. Third-Party Offline Installers
While not officially supported by Microsoft, community-developed tools can automate the DISM process for you:
.NET 3.5 Feature Installer (GitHub): An open-source batch installer for both 32-bit and 64-bit systems.
.NET Framework 3.5 Offline Installer (SourceForge): A GUI tool that automates the command-line installation from your media.
If you're having trouble accessing the SXS folder or mounting the ISO, tell me:
Do you have the Windows 10 ISO or installation USB available?
Are you seeing a specific error code (like 0x800F0906 or 0x800F081F)? Install .NET Framework 3.5 on Windows 10 - Microsoft Learn
While Microsoft provides a standard .NET Framework 3.5 web installer
, Windows 10 and 11 users often face challenges when trying to install this specific version without an active internet connection. Because .NET 3.5 is considered a "Feature on Demand," the most reliable offline installation method requires using the original Windows 10 installation media as a source. The Role of Installation Media
For Windows 10, the "offline installer" isn't typically a single
file but rather a set of payload files (CAB files) located within the \sources\sxs
folder of a Windows 10 ISO or USB installation drive. This folder contains the necessary bits that allow Windows to enable the feature without reaching out to Windows Update. Offline Installation Steps via DISM Technical Brief: Offline Installation of
To install .NET Framework 3.5 offline on a 64-bit Windows 10 system, you can use the Deployment Image Servicing and Management (DISM) tool through the command line: Mount the Installation Media
: Insert your Windows 10 USB or right-click your Windows 10 ISO and select . Note the assigned drive letter (e.g., Open Administrative Command Prompt
: Search for "cmd" in the Start menu, right-click it, and select Run as administrator Execute the DISM Command : Enter the following command, replacing with your specific drive letter:
DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs : Targets the operating system currently running. /LimitAccess : Prevents DISM from contacting Windows Update.
: Points specifically to the local files needed for installation. Verifying the Installation
Once the process reaches 100%, you can verify the status by checking the Turn Windows features on or off menu in the Control Panel. The box for .NET Framework 3.5 (includes .NET 2.0 and 3.0) should now be filled or checked.
For those without access to original installation media, Microsoft also offers a Full Package (Service Pack 1)
which acts as a standalone installer for older systems, though modern Windows 10 versions generally prioritize the media-based DISM method for stability. Do you have the Windows 10 ISO file bootable USB ready to use as your installation source? Install .NET Framework 3.5 on Windows 10 - Microsoft Learn
Here is the text you requested:
Download .NET Framework 3.5 for Windows 10 (64-bit) – Offline Installer
To install .NET Framework 3.5 on Windows 10 64-bit without an internet connection, use the built-in Deployment Image Servicing and Management (DISM) tool with your Windows installation media.
Steps:
Insert your Windows 10 installation USB or mount the ISO file.
Note the drive letter of the mounted media (e.g., D:).
Open Command Prompt as Administrator.
Run the following command:
dism /online /enable-feature /featurename:NetFX3 /all /source:D:\sources\sxs /limitaccess
(Replace D: with your media drive letter)
Alternative – Official offline installer:
Microsoft does not provide a standalone offline installer for .NET Framework 3.5 on Windows 10. The recommended method is the DISM command above. For deployment tools or advanced users, the required files are located at sources\sxs on the Windows 10 installation media.
Note: The .NET Framework 3.5 includes .NET 2.0 and 3.0. Do not download installers from third-party websites; always use official Microsoft sources or the DISM method.
For Windows 10, the official method to install .NET Framework 3.5 (which includes .NET 2.0 and 3.0) without an internet connection is to use the DISM tool paired with your original Windows 10 installation media.
The "offline installer" executables often found on the Microsoft Download Center for older Windows versions (like XP or Vista) generally do not work as standalone packages for Windows 10; they typically trigger a download prompt because the necessary files are built into the Windows OS image itself rather than a separate installer. Official Offline Installation Method (DISM)
To install .NET 3.5 offline on a 64-bit Windows 10 system, follow these steps:
Prepare Media: Mount a Windows 10 ISO file or insert a bootable USB drive.
Identify Drive Letter: Note the drive letter of the mounted media (e.g., D:).
Run Command Prompt: Click Start, type cmd, right-click it, and select Run as Administrator.
Execute Installation: Enter the following command, replacing D: with your actual drive letter:DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs Key Parameters Explained Installing .NET Framework 3.5 using offline ... - GitHub
This is a comprehensive guide on downloading and installing the .NET Framework 3.5 on Windows 10 (64-bit) using offline methods.
The safest way to get a 100% offline installer is to extract it from your Windows 10 installation ISO or USB drive.
What you need: A Windows 10 64-bit installation USB or ISO file (the same version as your PC).
Steps to extract the offline installer:
D:\).Dism /online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs
D: with the drive letter of your mounted ISO)To save the installer files for future offline use:
D:\sources\sxs folder to your hard drive (e.g., C:\Net35_Offline). You can use this folder on any Windows 10 64-bit PC.