Microsoft Net Framework 1.1 Service Pack 1 64-bit [upd] Download Page

Run the application in a or a Virtual Machine (VM).

Using .NET Framework 1.1 in 2024 and beyond carries significant risks. Because it no longer receives security patches, it can serve as an entry point for malware. Use it only for legacy software that cannot be upgraded.

Use a "slipstreamed" installer that combines the base framework and SP1 into a single execution file. Security Warning for Legacy Users microsoft net framework 1.1 service pack 1 64-bit download

You must first install the base before applying the Service Pack. 2. Download Service Pack 1

⚙️ Better handling of ASP.NET applications and runtime errors. Run the application in a or a Virtual Machine (VM)

Ensure your firewall restricts the application's access to the internet unless absolutely necessary. Troubleshooting Common Issues

A common misconception is that there is a native, standalone "64-bit version" of .NET Framework 1.1. In reality, .NET 1.1 was built primarily for 32-bit (x86) architectures. Use it only for legacy software that cannot be upgraded

If you are trying to get a specific piece of software running, I can help you further. Please let me know:

I can provide a for "slipstreaming" the installation if the standard download isn't working for you.

Are you getting a specific during the installation process?