1, the internal file of the game is lost, and Warcraft needs to be downloaded again. The game client is not big, now the network speed is fast to download another Warcraft game.
2. The problem may be caused by the wrong version of Directx file. We can call up the "Run" interface in Windows+R, and then enter "dxdiag" to check the version of Directx software and download it again according to the corresponding version.