D3dx10 system error shows when trying to play a game

Hi,
I just installed a new game on my laptop with Windows 7 and when I tried to open it, this System Error window appeared. I have uninstalled the game, rebooted the laptop and install it again, but I couldn’t get rid of this problem. I really want to make this game to work so is there anyone who can help me to run this game and tell me why I have this error and how can I solve it.
Thank you !

OBS.exe – System Error
The program can’t start because d3dx10_43.dll is missing from your computer. Try reinstalling the program to fix this problem.
OK
