Finally. Solved.
First of all,
I`ve no idea how it happend, I assume I clicked on wrong keys on my keyboard.
This is the error:
!IsNormalized (dir)
UnityEngine.Camera:ScreenPointToRay(Vector3)
UnityEngine.Camera:ScreenPointToRay(Vector3)
UnityEditor.HandleUtility:GUIPointToWorldRay(Vector2)
UnityEditor.Handles:SetCamera(Camera)
UnityEditor.SceneViewRotation:OnGUI()
UnityEditor.SceneView:OnGUI()
System.Reflection.MonoMethod:InternalInvoke(Object, Object[])
System.Reflection.MonoMethod:InternalInvoke(Object, Object[])
System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo)
System.Reflection.MethodBase:Invoke(Object, Object[])
UnityEditor.HostView:Invoke(String)
UnityEditor.DockArea:OnGUI()
[c:\builds\checkouts\branches\unity-2.6.x\Runtime\Geometry\Ray.h line 22]
I`ve also provided a picture :
http://up182.siz.co.il/up1/mynezcmwz2dx.jpg
And about uninstalling and reinstalling Unity engine, doesn’t work, It’s like there’s a tool that saves this error.
Thank you.