Navigate to the official Microsoft .NET Framework 3.5 Service Pack 1 download page using an internet-connected device.
Type or paste the following command into the prompt (replace X: with your actual mounted drive letter):
Use the full offline installer package (if available)
Windows 10 comes pre-installed with newer versions like .NET Framework 4.7 or 4.8. However, version 3.5 includes critical legacy components (.NET 2.0 and 3.0) that are not backward compatible.
Enable from Windows installation media (recommended for reliability) Net Framework 3.5 Offline Installer Windows 10 64 Bit
Press the , type cmd , and right-click on Command Prompt . Select Run as administrator . Click Yes if the User Account Control (UAC) prompt appears.
In the Administrator: Command Prompt window, type or copy the following command, replacing the drive letter D: with the one you noted in Step 1.
If you have the available.
If your offline installation fails, it is usually tied to a path mismatch or corrupted deployment data. Error Code Potential Cause Definitive Solution The source files could not be found. Navigate to the official Microsoft
Method 1: The Official Offline Installer via DISM (Recommended)
Look for a value named UseWUServer and change its data from 1 to 0 .
Do you currently have access to a or installation USB ?
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. In the Administrator: Command Prompt window, type or
Alternatively, you can navigate to C:\Windows\Microsoft.NET\Framework64\ and check if the v3.5 folder is present and populated.
The Microsoft .NET Framework has been the backbone of Windows application development since its inception in the early 2000s. As the Windows operating system evolved, so did the framework, leading to a divergence in runtime architectures. Windows 10, by default, includes .NET Framework 4.6+ (or higher depending on the OS build). However, a significant portion of the software ecosystem—including SQL Server Management Studio, AutoCAD, various ERP systems, and older proprietary business tools—relies on the .NET Framework 3.5.
For Windows 10 (64-bit), the only official way to install without an internet connection is by using the DISM command paired with Windows 10 installation media . Standard standalone installers for version 3.5 often fail on Windows 10 because the OS requires specific "on-demand" files found in the original installation source. Offline Installation Steps Install .NET Framework 3.5 on Windows 10 - Microsoft Learn
