Get the full package and try installing it. If that doesn't work, repair install; else, uninstall and install again. Make sure to get updates from Windows Update after installing.

Developer ‘confusion’ over the download size of the .NET 3.5 framework service pack one has led to the creation of a free online tool and new client profile configuration option. Issues were first ...

Windows Server 2008 x64, two of them in fact in an NLB cluster. Trying to install .NET Framework 4, first went fine, second refuses. Running installation package - both the web installer and full ...

Microsoft has warned Windows 11 users that they might experience issues launching and using some .NET Framework 3.5 applications. This known issue impacts only systems running Windows 11, version 21H2 ...