워크3 오리지날 정품씨디로 깔았는데 에러가 자꾸 나요

Warcraft III was unable to initialize DirectX, Please ensure you have DirectX8.1 or newer installed and that your display drivers are current DirectX may be found on your Warcraft III install CD under Options 라고 나오고요

CD-ROM에 없다고 나와요

확장팩은 아직 안깔았구요

해결책좀 알려주세요 꼭이요ㅜㅜ