ad603a7745 IIS 7.5 Express Readme By Vaidy GopalakrishnanFebruary 26, 2012. Expand the additional categories displayed, and select any additional features you want to install, such as Web Management Tools. 9. If you still prefer to do this on your desktop, you can install IIS on it, as well as other applications and extensions easily using the Microsoft Web Platform Installer (Web PI). The 7.5.1190 version of IIS 7.5 Express that was released in March, 2012, contains several bug fixes from the the original 7.5.1070 version of IIS 7.5 Express that was released in April, 2011, but no new features were introduced. If .NET 3.5 is missing when IIS 7.5 Express is installed, the default applicationhost.config file will include handlers for.NET 4.0 only. Additional categories of IIS features are displayed. IIS Express makes it easy to use the most current version of IIS to develop and test websites.