This is an ongoing problem with 2 of my computers.
The pc running it:
AMD Sempron™ processor 150
2GB DDR3 memory
NVIDIA GeForce 6150 SE integrated graphics
Microsoft Windows 7 Home Premium
and the other:
Intel Pentium 4
Intel Extreme Graphics
So... And i tried the steam version i got along time ago, and the version for the trilogy. I dont know why this is happening. Is there a patch to fix this?