If you are trying to install Elgato Video Capture on Windows 10 and get an error message "This application requires .net framework 3.5", then this is most likely an error due to the fact that this feature is not enabled on your Windows 10.
The following steps should be taken to remedy this problem:
Afterwards, please try installing Elgato Video Capture for Windows once more. If the issue should still remain, then please download and install the .NET Framework 3.5 from the following page:
If you should still encounter problems, then please don't hesitate to contact our Support Team here.