Download Net Framework 35 Offline Installer For Windows 10 11 Free Free
If the system is configured via Group Policy to ignore Windows Update, installation might fail.
or insert your USB drive. Note the drive letter (e.g., D: ). Open Command Prompt (Admin) or PowerShell (Admin) .
Type the following command into the Command Prompt window and press :
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Windows will prompt you to let Windows Update download the files for you. Select to conclude the installation. Verifying the Installation
Installing .NET Framework 3.5 offline on Windows 10 and 11 requires using a Windows installation source, as the standard online installer often fails without an internet connection. This version is essential for running older applications built for .NET versions 2.0 and 3.0. Microsoft Learn Method 1: Using Windows Installation Media (Recommended)
Paste the following command and press Enter: reg query "HKLM\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5" /v Version Open Command Prompt (Admin) or PowerShell (Admin)
The ISO must match the exact version of Windows (Home/Pro) and build (e.g., 22H2) you are using.
如果你的电脑虽不能联网，但插入了Windows安装光盘，或者系统保留了本地源，可以尝试此方法。
After running any of the methods above, you can easily confirm that .NET Framework 3.5 is fully functional: Open or PowerShell as an administrator. To cover all aspects, I will perform multiple
If you attempt the standard Windows "Turn Windows features on or off" method and receive error 0x800F081F, it means Windows cannot find the source files.
Method 2: Download the Official Standalone Installer Package
Select to open an elevated command prompt window.
Method 2: Create a Local Offline Installer Using Windows Media
Microsoft has announced that starting with future versions of Windows 11 (likely beginning with version 26H1), .NET Framework 3.5 will no longer be available as an optional feature you can simply turn on.