Full system freeze [crash]

Randomly i will experience a full system freeze when i hit space bar. seems to be a bug with the camera controls, since it has not occurred with chat, also due to the nature of the crash, i am unable to record it, and must do a full system restart every time it occurs. interval before it occurs seems to decrease with game length, since it has never occurred before the 5 minute mark, with increasing regularity as the game progresses with one exception being it freezing on loading screen. does not appear to be champ dependent, with two games now having this occur.

I like League, but with all the bugs lately, and being penalized for them, i think i shall go elsewere.