Incearca cu directx web installer www.microsoft.com/en-us/download/details.aspx?id=35
Este o problema la joc, m.am interesat si poti face asa: intra in folder League of Legends/Config/ si sterge
'game.cfg' si 'input.txt' (apoi ar trebui sa iti mearga) daca problema persista intra in folder League of Legends/RADS/projects/lol_game_client
si lol_game_client_en_us stergi alea doua foldere apoi rulezi Repair tool