Press . The Deployment Image Servicing and Management (DISM) tool will extract the framework directly from the media and install it. This process takes less than two minutes and requires zero internet. Method 3: Enable .NET Framework 3.5 via Windows Features
Open gpedit.msc (Group Policy Editor). Navigate to Computer Configuration > Administrative Templates > System . Find the setting Specify settings for optional component installation and component repair . Set it to Enabled and check the box for Contact Windows Update directly to download repair content instead of Windows Server Update Services (WSUS) . Conclusion
This is the easiest method if you have a stable internet connection. Go to . Check the box for .NET Framework 3.5 (includes .NET 2.0 and 3.0) . Click OK, and Windows will automatically download the necessary files from Windows Update.
Double-check your DISM command drive letter. Ensure that the version of the ISO you mounted matches your installed operating system exactly. (e.g., Do not use a Windows 10 ISO source folder to install .NET 3.5 on a Windows 11 machine). Group Policy Restrictions (Enterprise PCs) Method 3: Enable
This issue often surfaces when your system configuration blocks the internal Windows Update frameworks from executing background verification tasks.
How to Download .NET Framework 3.5 Offline Installer for Windows 10 and 11 (Free)
While Windows allows you to enable this feature via the Control Panel, it often requires an active internet connection to download files. This article provides a comprehensive guide to , allowing you to bypass internet requirements and activate this feature on any machine. What is .NET Framework 3.5 and Why Do You Need It? Set it to Enabled and check the box
注： netfx3.cab 需提前下载并与该脚本放在同一文件夹下。
The safest and most reliable way to get the offline installer is directly from Microsoft. Avoid third-party websites that bundle malware with the setup files. Go to the official Microsoft Download Center.
Downloading the .NET Framework 3.5 offline installer for Windows 10 or 11 is a straightforward process. Here are the steps: Open as an administrator.
However, reliable third-party repositories host the full framework packages, or you can use the installer, which functions as a full offline installer.
Once the installation wizard or command prompt finishes, you should verify that the framework is active. Open as an administrator.