Unity 3D Dont Start

plz help me,I was installed all versions,I cant solve this problem,dont give any error,help me!

sorry for bad english :9

Send an e-mail to Support@unity3d.com with the following:

  • What are you trying to do.
  • Screenshots of what is happening.

Also remember, if you are installing many different versions of unity on the same machine, then they should be installed into different directories.

why you need just this is beacause u use windows xp or older just download 3.x and no problems