.NET Framework 1.1 is not supported on Windows 7 nor Windows Server 2008 R2 and higher Operating Systems
Microsoft .NET Framework version 1.1 is not supported on any version of Windows 7 or Windows Server 2008 R2 and higher Operating Systems.
Applies to: Windows 10 - all editions, Windows Server 2012 R2
Original KB number: 2489698
While it might be possible to install .NET Framework 1.1 components on these operating systems, Microsoft will provide no level of support for these configurations.
The Microsoft .NET Framework 1.1 is supported on operating systems up to and including Windows Vista.
More detailed information about newer .NET Framework Versions and OS Dependencies is available at the following web site:
If you need assistance from Microsoft support, we recommend you collect the information by following the steps mentioned in Gather information by using TSS for deployment-related issues.