Light & Shadows are poorly displayed

Hi there,

i opened today my Project and then suddenly my scenes where gone.
But thats ok, i got a Backup so i opened the Backup.
I created a new Scene and placed Objects in it.(Directional light, Point Light, some cubes and a camera)
The quality settings are set to the highest and i never got a problem like that.
I tried to reinstall Unity but the Problem still remains, even with new Projects.
I looked up my Graphic-card driver and DirectX but they are up to date.

And this is the result i get in the Editor:

This is the Ingame result:

Thx in advance for the help!

I also got crappy jaggy shadows, thread jaggy shadows unity 5.1 but no help as yet