Things what i done:
-Reinstall
-Tried older version (5.0 works)
When i start a new project or i start an older project its just loading and showing this screen.
I just had the same problem. Game made in 5.2 on Mac, then couldn’t deploy on 5.4 Windows without a White Screen. I fixed it:
Make a backup of your entire Unity project folder. Then delete your Library folder.
When you restart Unity, it’ll rebuild your Library folder, and the next deployment should work just fine.
I am very new to Unity, so please proceed at your own risk, or wait for a more experienced developer to weigh in.