Apply the service pack patch to the administrative installation:
If you absolutely need to run a .NET 1.1 app on a 64-bit system:
: Provides essential performance and security updates (KB867460). Microsoft Update Catalog How to Install on 64-bit Windows 10/11
Searchable via the Microsoft Update Catalog (KB867460). Installation for 64-bit Windows (10/11) microsoft net framework 1.1 service pack 1 64-bit download
Do you need help during this installation process?
Check the box for and click OK . Allow Windows to download and install the files. Technical Knowledge Base - Confluence - Atlassian
because it was only built as a 32-bit (x86) program . However, you can still run apps that require this ancient software on modern 64-bit Windows computers . Apply the service pack patch to the administrative
If you are struggling to get the .NET 1.1 SP1 installed, or if it is crashing on your 64-bit system, consider these alternatives:
dotnetfxsp1.exe /Xp:C:\DotNet\patch.msp msiexec /p C:\DotNet\patch.msp /a C:\DotNet\netfx.msi Use code with caution.
The Microsoft .NET Framework 1.1 Service Pack 1 (SP1) is a critical update for the 1.1 version of the .NET Framework, designed to improve security, reliability, and performance. While .NET Framework 1.1 is considered a legacy product, it is still required to run older applications, particularly those developed for Windows Server 2003, Windows XP Professional x64 Edition, and early Windows Vista/Server 2008 environments. Check the box for and click OK
If a critical business application requires .NET 1.1, run it inside a virtual machine (VM) or a container detached from the primary corporate network.
Service Pack 1 (SP1) for version 1.1 is a cumulative update roll-up that addresses numerous issues discovered after the original release. Its primary focus is on improved security. It also provides:
Migrate from .NET Framework 1.1, 2.0, and 3.5 - Microsoft Learn Windows no longer supports . NET Framework 1.1 and 2.0. Microsoft Learn
Improves compatibility with the 64-bit Windows translation layer.
