Game keeps crashing, but not everytime.

Well, not much more to say. I have tried the latest AMD driver and then the optional one after that both versions 26.9.1 and versions 26.9.2.
        Leading up to season 5 is when it started. 
     I get the game closes and I end up back at windows, very smooth. No tearing of the screen or odd sounds.
    Does not happen every time though. Maybe 1 out of three times I'll play a few games in a row and there is not game shut down no, back to windows.
    Anyway any thoughts on this ? I may try rolling back to an even earlier driver. like two or three before the latest.