The game may not work perfectly because your computer has only 1 GB RAM. I suggest you check if the PC answer to all other system requirements:
- Windows 95/98/XP/ME/Vista/7;
- Processor 800 Mhz or better;
- RAM: minimum 1024Mb;
- DirectX 9.0 or higher;
- DirectX compatible sound board.
If this requirements are fulfilled, you can improve your computer performance using the steps provided by Microsoft Support web page.