Download .NET Framework 3.5 SP1 (Full Package) Version: 3.5 SP1 (Includes .NET 2.0 and 3.0) Size: Approximately 231 MB.
Temporarily disable your third-party antivirus software, restart your machine, and attempt Method 2 again using the command prompt. Verifying the Installation
Press . The command prompt will display a progress bar. Once it reaches 100%, you will see the message: "The operation completed successfully."
For users who need to install this on multiple computers or have no internet access, the official offline installer is the best method.
Download .NET Framework 3.5 Offline Installer for Windows 10 & 11 Download
Can be deployed via Command Prompt (CMD) or PowerShell for enterprise environments. Pros & Cons offline install.NET 3.5 with Windows 10 - Server Fault
Even with the offline installer, errors can occur. Here are the fixes for the most common issues:
: On Windows 10 and 11, the standalone dotnetfx35.exe may still trigger a Windows Update prompt to "Download and install this feature". For a truly offline experience, using the Windows Installation Media is the most reliable method. 2. Install Offline Using Windows ISO (Recommended)
If your offline machine is connected to a local network that has access to a Windows Deployment Services (WDS) server or a network share with the installation files, you might be able to use the graphical interface. However, for a purely offline machine with no network access, this method may not work. The command prompt will display a progress bar
Wait for the installation to finish and restart your computer if prompted. Troubleshooting Common Offline Installer Errors Error Code: 0x800F0906, 0x800F081F, or 0x800F0922
Even with the offline installer, errors can occur. Here is how to fix them.
to finalize the installation.
If you are currently online but need an installer to take to a different, offline machine, Microsoft provides a "full package" (Service Pack 1) that acts as a standalone installer. Install .NET Framework 3.5 on Windows 10 - Microsoft Learn Pros & Cons offline install
: Plug in your Windows USB drive or right-click your Windows ISO file and select Mount . Note the drive letter (e.g., D: or E: ).
Includes support for .NET 2.0 and 3.0, making it essential for apps built between 2005 and 2010.
To verify that .NET Framework 3.5 has been installed successfully: