If you see error 0x800F0954 when installing .NET Framework using Optional features in Windows 11/10, here's what you need to do to fix the issue.

Follow these steps to fix .NET Framework 3.5 Installation Error 0x800F0950 in Windows 11/10. They are sure to help you fix the issue.

Yesterday, Microsoft posted the final version of the .NET Framework 3.5 to its download site, as well as several updates to other .NET Framework versions.

Additionally, if you don't want to download the whole Redistributable package from Microsoft (thus skipping steps 1-3), download only the CAB file for .NET Compact Framework 3.5 from MoDaCo.