Net Framework 1.1.4322 Updated Download Page

You are likely looking for this download for one of two reasons:

This happens because modern versions of IIS (Internet Information Services) conflict with the 1.1 framework. You can safely click Ignore or Continue on this prompt. The core runtime libraries will still install successfully. 2. The Application Instantly Crashes (DEP Trigger)

What is the you are trying to run?

Open File Explorer and navigate to C:\Windows\Microsoft.NET\Framework . Look for a folder named v1.1.4322 . Net Framework 1.1.4322 Download

Attempting to install the 1.1 package on Windows 10 or Windows 11 will likely fail directly because it is incompatible with modern security and architecture. The "Slipstream" Trick:

Run this command to merge the service pack directly into the original installer installation file: msiexec /p C:\DotNet\subsp1.msp /a C:\DotNet\netfx.msi Use code with caution. Step 4: Run the New Installer

Because Microsoft has removed the official download pages for this version from their main catalog, reliable downloads are harder to find. The original package name is usually dotnetfx.exe . You are likely looking for this download for

Have a specific error code related to .NET 1.1.4322? Leave a comment below (but remember—we recommend upgrading!)

Many proprietary accounting, manufacturing, and inventory systems built in the early 2000s were never upgraded.

"This application requires one of the following versions of the .NET Framework: v1.1.4322" Look for a folder named v1

This is the most important section for any administrator or user.

Before you hit that download button, run through this checklist:

Help you find a for your application. Give you security strategies for running outdated software. Help you find a similar tool that is still supported. Let me know how you'd like to proceed .

.NET Framework 1.1.4322 was a pivotal release in Microsoft's development platform history, introducing features like side-by-side execution and mobile controls. However, it is now an obsolete and unsupported piece of software. While this guide provides the necessary information to download and install it for legacy application support, doing so carries significant security risks. The framework is only officially compatible with Windows versions up to Windows Vista and is not supported on modern operating systems like Windows 10 and 11. For any critical application or system, the only secure and recommended path forward is to upgrade to a modern, supported version of .NET Framework. Use the information in this article as a resource for archival purposes or for isolated, legacy environments only.

Installing .NET 1.1 will not break your current installations of .NET Framework 3.5, 4.8, or modern .NET Core/.NET 8. Windows is designed to allow multiple versions of the framework to run side-by-side without interference. Security Implications to Consider