Hi AnonymeR77,
A couple things to check. First, does your username contain any special characters (eg. é)? If so, we do have an issue we are working on correcting where special characters in file paths can prevent projects from building successfully. Try creating a project in a location that does not contain any special characters (eg. C:\ProjectFolder).
Second, what version of Visual Studio Express are you using? Is it Visual Studio Express 2013 for Windows Desktop? That is the only Express version that will work with Unreal Engine 4.