This is the primary source. If you have a professional or enterprise subscription, you can log in to the My Visual Studio portal. From there, you can search for "Visual Studio 2012" and download the ISO files for Professional, Premium, or Ultimate editions.
Microsoft still hosts the "Update 5" installers (the final stable build of VS 2012) on their Download Center. This is often an executable that patches an existing installation or pulls files from Microsoft servers. Key Editions of Visual Studio 2012 visual studio 2012 download microsoft
It remains the definitive tool for developers needing to build or debug original WinRT (Windows Store) applications. Installation Tips This is the primary source
The comprehensive suite for teams. It includes advanced architecture, modeling, and testing tools like IntelliTrace. Microsoft still hosts the "Update 5" installers (the
To avoid permissions issues during the installation of deep system components (like SQL Server Express), right-click the setup file and select "Run as Administrator."