Have you downloaded all microsoft updates in your computer?
You may want to download the NET Framework here: https://www.microsoft.com/en-us/download/details.aspx?id=22
Try installing Pinnacle Studio 14 as an administrator and try again.
NOTE: Windows Vista is about to end its support on April 11, 2017. There are some internet sites that are no longer working or being updated on Vista. If you plan on using the internet I would strongly recommend you to update to either Windows 7, 8.1 or 10. PS14 may work on Windows 7 but believe you might have some problems under 8.1 or 10 but not too sure.