Check if your computer meets the minimum system requirements:
- Pentium 3 with 800 MHz and 256 MB RAM;
- Video card with DirectX 8 compatibility and 32 MB RAM;
- Windows 2000, XP, Vista, 7;
- DirectX 9 installed.
If the requirements are fulfilled, update your video card driver and reinstall DirectX. After that, download a new copy of the application and install it following the provided steps.