Possibly save 1 hour of your time: I am trying to use Umbraco CMS, an open source content management system.
I download and install WebMatrix3.
Then I download the latest package for Umbraco and unzip.
Next I right click on folder and choose open as a website with Microsoft WebMatrix
Then you click Run in the WebMatrix.
It will bring you to back office (admin area) for Umbraco. You can also install Umbraco Forms by going to the left menu items and click on Forms and then install button. After you install, you still need to buy a license to use it.