Right-click the executable on your offline PC and select to begin the localized extraction and setup process.
The official way to install .NET Framework 3.5 offline on Windows 10 or 11 is by using your (USB or ISO) . While there are "standalone installers" from Microsoft, they often still trigger a Windows Update check on modern OS versions.
Copy and paste the following command into the window (replace D: with the actual drive letter of your Windows installation media):
右键开始菜单，选择“Windows终端”或“PowerShell”，输入以下命令：
: This is the official redistributable package (approx. 231 MB) that works for offline deployment. Right-click the executable on your offline PC and
: The progress bar will reach 100%. Once finished, you may be prompted to restart your PC. Alternative: Using "Windows Features" (Internet Required)
: Once the progress reaches 100%, the feature is enabled. How to Install .NET Framework 3.5 on Windows 11 [Tutorial]
The safest, official way to install .NET Framework 3.5 offline is by extracting the source files directly from your Windows installation media (ISO file or bootable USB drive). This method is entirely free, secure, and requires no external third-party software downloads. Step 1: Mount the Windows ISO or Insert USB Locate your Windows 10 or Windows 11 ISO file.
Open in File Explorer and note the exact drive letter assigned to the mounted ISO or USB (for example, Drive D: or Drive E: ). Copy and paste the following command into the
: Corrupted system components often trigger errors during live installations, blocking standard activation attempts.
If you have no internet access, you can install it using a Windows ISO or installation USB. Install .NET Framework 3.5 on Windows 10 - Microsoft Learn
Many legacy applications and older games still rely on (which includes versions 2.0 and 3.0) to run correctly on modern versions of Windows. While Windows 10 and 11 usually try to fetch these files from Windows Update, this isn't always possible in offline or restricted environments. Why Use an Offline Installer? Install .NET Framework 3.5 on Windows 10 - Microsoft Learn
: Insert your USB or right-click your Windows ISO and select Mount . Note the drive letter (e.g., D: ). Once finished, you may be prompted to restart your PC
. Windows will automatically download and install the required components. Microsoft Learn Install .NET Framework 3.5 on Windows 11 - Microsoft Learn
For the latest versions of Windows 11, Microsoft provides a dedicated standalone installer available via Microsoft Learn .
You’ll see: