u downloaded a corrupt setup, try another site, preferably the official site, if you downloaded a good one try changing the directory...
if that doesnt work then good luck lol
Whenever I download it, and start the setup, I get this error saying "Unknown trust provider" and the installation fails.
Please help.
Download the one from Microsoft, and use the Internet Downloader version
Right, I download the official version from Microsoft and that doesn't work. What do you mean by changing my directory wolffang?
Did you download from here: Download details: Microsoft .NET Framework 4 (Web Installer)?
If so, then maybe you don't have .Net Framework 3.5 installed first? Get 3.5 here: Download details: .NET Framework 3.5