System Information:
CPU: Intel core i5-3450 @ 3,1Ghz (4 cores)
GPU: AMD Radeon HD 7870
RAM: 8GB DDR3
OS: Windows 7 Home Premium 64-Bit

Emulator is Dolphin v4.0 I'm not using any plugins and already tried redownloading the ISO.

So the problem is that the game starts and everything works fine but as soon as I try to start the career or start a custom race it freezes on the loading screen.

I'm not really experienced concerning emulation and would be really pleased if you'd help me with this problem.