เปิด Assassin creed 3 มันขึ้นงี้ง่ะ

unable to find the ubisoft game launcher,please re-install assassin's creed III.

ubisoft game launcher:
there was a problem starting your game, the ubisoft game launcher was not
found. please try re-installing the game. error code is 3.
เเก้ไง