Hi there,

Microsoft .NET Framework 1.1 lifecycle started on 7/10/2003 and Service Pack Support Ended on 9/9/2005. You can get this information from the below thread.

Search Product and Services Lifecycle Information
https://answers.microsoft.com/en-us/windows/forum/all/need-a-download-link-to-ney-framework-114322/92630f40-e886-4dbf-b1c9-559d2375d33b

It isn't possible to manually install .NET Framework 1.1 on Windows. If you try to install the package, the following error message is displayed: "Setup cannot continue because this version of the .NET Framework is incompatible with a previously installed one.

Migrate from the .NET Framework 1.1
https://learn.microsoft.com/en-us/dotnet/framework/migration-guide/migrating-from-the-net-framework-1-1

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