I get error message "Net 4.0 is not installed." But it is installed
I had the same trouble. You first need to uninstall .NET 4, then install .NET 4 "Full" from here: http://www.microsoft.com/en-us/download/details.aspx?id=17718
Then install the patch KB2468871 from here: http://www.microsoft.com/en-us/download/details.aspx?id=3556
After installation, you will see both .NET 4 Framework Client Profile and .NET 4 Framework Extended listed in the Programs and Features screen, and updates for both listed in Installed Updates.
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