Unity editor crash with Camera,Unity editor crashes with Camera

I am trying to build the basic 3D Monument as per tutorial. But the moment i click on the Main Camera - the Unity editor crashes. Next I restart and use the Sphere rigidbody , hit play to check, again it crashes. It asks me to report a bug with Unity. Did anyone face the same issue before? Pls help to fix this recovery. I am unable to check anything beyond.,I am trying to build the basic 3D Monument as per tutorial. But the moment i click on the Main Camera - the Unity editor crashes. Next I restart and use the Sphere rigidbody , hit play to check, again it crashes. It asks me to report a bug with Unity. Did anyone face the same issue before? Pls help to fix this recovery. I am unable to check anything beyond.