I am using Eevee rendering. I have installed Blender 2.8 (tried 2 different versions on each) on 2 different machines. They both have the same problem. All light sources cast their own shadow. The default scene shows like this. No changes were made to the scene, and I don't think I changed any of the preference options.
When I add a plane you can see what is happening.
You can see the shadow circle around the object. If I turn off shadows on the light, everything looks normal, except for the fact that nothing casts a shadow. You can see that it does create a little light when it's right next to something. The shadow grows/shrinks when I adjust the shadow distance parameters. I'm new to blender, so I'm not sure what information would be helpful, but so far I can't find anything to fix this, and no one else seems to have this problem. Thanks in advance.