Pink scene view, skybox and materials (Unity 5.4.1f1)

Whenever i start a project, the entire 3D viewport is pink, changing the camera to solid color solves it in the game window but not in the 3D viewport.
The materials using default setting also have a pink hue around them.
What could be causing this problem?

In Unity 5.4.1f1
Goto the Windows > Lighting Then click on Scene tab and then select the Skybox and press delete button
After that goto the scene view and click on Toogle Skybox, fog and are lens effect , beside you see a drop down icon click on it and then uncheck the Skybox option. And Start working.
Don`t forget to save your scene.
This may help you!
Thanks!!

you need a video card