Can't start a match

League OF legends.exe - System Error

The program can't start because dd3dx9-39.dll is missing from your computer. Try reinstalling the program to fix this problem.

1st try of repair: I tried Repairing Twice, It downloaded a 2MB file and then the game was ready to launch, Tried starting a match in custom, Same error pops up.

2nd try of repair: Simple repair, Game ready to launch, Tried starting a match in custom, Same error pops up.