I cant start horizon, how can i do?

good evening, i have windows 7 with NET framework 4.5 , but i cant start horizon, when i try to start horizon, windows stopped working horizon,

Do you have Net Framework 3.5? Try installing it if you don’t.
Get it here: http://www.microsoft.com/en-us/download/details.aspx?id=25150

You should also try a fresh install of Horizon from this link: https://www.horizonmb.com/client/v2/latest.php

Try these possible solutions and post back if you need more assistance.