Leage fail

My game just crashed and supposedly riot hadnt installed correctly i have wind. 7 and my internet is ok (usual ping of 50) i installed it from the wepsite so dont know how it can not install correctly. I got a leaverbuster which is tilting but not the end of the world even though i installed it normally but not the world but i just wanted to ask what i can do to make shure that on the next ranked game i want to play same thing does not happen again?