**EDIT:** I fixed the problem by removing WindowFX(by Stardock).
When I start Unity3D into my new project(with nothing.), nothing shows up in the windows. The "Welcome To Unity" windows is there, but nothing shows up as well. Just the color black shows up. All what shows is a menu. That's it.
Here's a picture.
![alt text][1]
[1]: /storage/temp/19947-whyunitywhy.png
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