[SmartScreen warning when trying to install.]

I'm seeing the SmartScreen warning dialog shown below whenever I try to install the non-Store version of the app.  I can bypass the warning by clicking "More info" and then "Run anyway", but it might throw off less tech-savvy people.

 

[Integrated laptop camera not recognized]

I just got a new ThinkPad X1 Carbon with a built-in camera.  Whenever I try to acquire an image the only imaging device in the list is my scanner.  How can I get the camera to work with Paint.NET?