: Temporarily disable Windows Update group policies that restrict optional feature installations.
Press Win + R , type gpedit.msc , and navigate to Computer Configuration > Administrative Templates > System . Look for "Specify settings for optional component installation and component repair" . Set it to Enabled and check the box for "Download repair content and optional features directly from Windows Update instead of Windows Server Update Services (WSUS)" . Verification: How to Check if .NET 3.5 is Installed To verify that the offline installation worked seamlessly:
: 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
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. : Temporarily disable Windows Update group policies that
Microsoft provides two primary ways to obtain the .NET Framework 3.5 offline:
| Factor | Detail | |--------|--------| | | The sxs folder contains both 32-bit and 64-bit packages. The DISM command automatically detects the correct one for your 64-bit OS. | | No Microsoft-provided single EXE | Any website offering a standalone dotnetfx35.exe claiming "for Windows 10 64-bit offline" is likely unofficial and potentially risky. Always use the official ISO source. | | Verification | After installation, verify via Control Panel → Programs and Features → "Turn Windows features on or off" – .NET Framework 3.5 should be checked. |
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 (ISO or USB). Recommended Offline Installation Method Set it to Enabled and check the box
: Resolves common installation error codes (such as 0x800F0906 , 0x800F0922 , or 0x800F081F ) triggered when Windows Update fails to fetch the framework packages.
Press , type optionalfeatures , and press Enter .
| Error Code | Problem Description | Most Effective Solution | | :--- | :--- | :--- | | 0x800f0906 , 0x800f081f , 0x800f0907 | DISM cannot find the source files. | Your /Source: path is incorrect. Double-check the drive letter of your mounted ISO. Ensure the command uses /LimitAccess . If you're using the CAB method, ensure the file name and path in the command are exact and the file isn't corrupted. | | 0x800F0950 | The source files are corrupt or from a different version of Windows 10. | The Windows 10 ISO you are using is (e.g., build 1909 vs 22H2) or architecture (32-bit vs 64-bit) as your installed OS. You must source an ISO that matches your target system exactly. | | 0x80004005 | A general, unspecified error. | This often points to a conflict with a third-party antivirus program. Temporarily disable your antivirus and any VPN software. Then, try the installation again from an elevated Command Prompt . Also, try running SFC /SCANNOW in an admin command prompt to fix any system file corruption before retrying. | | Installation Hangs | The progress bar seems stuck. | This can happen with the online installer. If you are using an offline method and it gets stuck for over 15 minutes, close the command prompt, restart your computer, and try mounting a fresh, cleanly downloaded ISO. | Important Considerations Install
: The process will reach 100% and show "The operation completed successfully".
Look for the value and change its data from 1 to 0 .
To install 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)
: Ideal for secure, air-gapped workstations or remote locations without reliable web access.
Copy and paste the following Deployment Image Servicing and Management (DISM) command into the window. Make sure to replace D: with your actual Windows 10 media drive letter: