Locate the subfolder named (this folder contains the file microsoft-windows-netfx3-ondemand-package.cab ).
: Corrupted system components often trigger errors during live installations, blocking standard activation attempts.
.NET Framework各个主要版本（1.x/2.x/3.x 与 4.x/5/6/7/8）是可以在系统中 的。旧应用程序在编写时直接调用了旧框架（2.0或3.5）的特定API，这些API在新框架中可能已被弃用或修改。因此，为了兼容老旧的业务系统，系统需要单独保留这份18年的“老将”，直到其在2029年1月9日正式终止官方支持。
The .NET Framework 3.5 is an older version of the .NET Framework that was widely used in the early 2000s. Although it's been succeeded by newer versions, such as .NET Framework 4.8, some applications and games still rely on version 3.5 to function. This is often the case with: Locate the subfolder named (this folder contains the
If your computer has a stable, unrestricted internet connection, Windows will normally download these files automatically when a program requests them. However, if you are setting up a machine offline, working in an isolated enterprise environment, or constantly running into Windows Update error codes like 0x800F0906 or 0x800F081F , you will need an offline installer.
Q: Can I uninstall the .NET Framework 3.5 if I no longer need it? A: Yes, you can uninstall the .NET Framework 3.5 if you no longer need it. However, be aware that some applications may rely on this version to function properly.
How to Download .NET Framework 3.5 Offline Installer for Windows 10/11 (Free) Although it's been succeeded by newer versions, such as
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Method 2: Enabling It Offline via Windows Features (If Files Are Cached)
Downloading the .NET Framework 3.5 offline installer for Windows 10 or 11 is a straightforward process. Here are the steps: Q: Can I uninstall the
The most reliable way to install it without an active internet connection is to use your original Windows installation media (ISO or USB) . or insert your Windows USB drive . Identify the drive letter (e.g., D: ).
Here are the best methods to install the framework without an active internet connection. Method 1: Using the Windows ISO File (Recommended)
: Wait for the progress bar to reach 100%. Once finished, you will see a "The operation completed successfully" message. Microsoft Learn Method 2: Enabling via Windows Features (Limited Offline)
tool. This is often the most reliable method when the standalone installer fails. Microsoft Learn Mount your Windows media (e.g., right-click your Windows ISO and select ). Note the drive letter (e.g., Command Prompt Administrator Run the following command, replacing with your actual drive letter:
: The progress bar will reach 100%. Once finished, you may be prompted to restart your PC. Alternative: Using "Windows Features" (Internet Required)