My League keeps on crashing. Pls help!

Hi guys, i need help ive been having this problem for weeks now trying to figure whats the problem and how to fix it. my computer crash and i had to reboot my computer. After i fix it i download league again. it was fine for like 2-5 games then after, it keeps crashing on the loading screen. what i mean by that is when we pick champions already and about to start, hence the loading screen. so what i did was re-install the game.

when i install league, it got worst. i cant even get online and it shows second para image below. so maybe i thought its because of my comp. i download adobe air and directx 11 or something like that. i have windows 8 and i could not download directx 9.

after i download it, i was able to log in, HOWEVER, the problem did not stop there. As you can see the image below picture 2 the summoner icon and summoners spells are invisible. i thought i will be fix in due time, which did not. So i just started a custom game and another problem pop up, in image 3.

I hope you could help me with this problem and sorry for the inconvenience.