League of legend crashes

i can start league of legend and login. i can create a game and start that game but when i try to go in the game my launcher crash and i can't do anything. i tried to patch files problem and nothing change. in the first time i had dll problem and i reinstalled the dll and the game was the same as before except for the crash message. this dll was missing : " d3dx9_25.dll ". i have the same problem with age of empire 3. can anyone help me ?
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