Error when loading the game...

An unknown directx error has occured and league of legends cannot start. please make sure your video card is using the latest video drivers from the manufactuerer; this is what has been happening for the past 2 days now, my graphics card's are updated, I'm running a GTX 750 Ti right now ( I can play much more graphic intensive games mind you; Wolcen, Lords of Shadow, per say ) and this game was running fine earlier yesterday; then it happened after i went on a massive win streak in ranked, (hit silver 4 :D) Did this error about 2 times, updated cards, restarted computer; proceeded to work again for a few hours, shut down computer, booted up this morning; this happens again; now i'm on a 5 game restriction for lower queue because the game decided to crash out and now i get penalized for it?