Background: I downloaded Visual Studio 2017 and installed the latest SDK ("10.0.17763.0"). I then proceeded to download the Windows 10 October 2018 Update. I discovered that there were problems with this version, that have since been corrected but I am no longer was comfortable using it only a few weeks after its release, so I did not download it. When I preceded to create a UWP app and attempted to look at the XAML, I got the following error: "Visual Studio requires a newer version of windows to display this content". I did some research and discovered that I could change the target version by going to "Properties > Application > Target:". When I clicked on the drop down arrow, there was only one selection, the SDK I had initially installed. I need the previous version.