: Access older versions through the Visual Studio Older Downloads page.
: For a stable installation, download the ISO format (approx. 7 GB) rather than the web installer. : Access older versions through the Visual Studio
You do not need "product keys" from unofficial sites to use Visual Studio 2015. Microsoft provides the for free to individual developers, students, and open-source contributors. : Access older versions through the Visual Studio
: Choose specific features like Universal Windows App Development or Cross-Platform Mobile Development (Xamarin). : Access older versions through the Visual Studio