Game is crashing! UNITY

I’m playing, and then after couple of minutes the game crashing! unity crashing im sending always the error msgs, so what to do?

[editline]28th September 2013[/editline]

Now the game is crashing every log in! i cant play at all


That happened to me in the beginning too.
clean internet catch in your browser or try another browser.
Use CCleaner.

if it happens again, post the error it gives.