DirtRid3r, please post ur PC specifications or better still, edit your signature to include your specifications. That way, u wont have to type it out everywhere, every time.
Coming to your problem, Either you have insufficient RAM, or Insufficient free space on the drive where u installed the game or the drive where windows is installed. Other possibility is that, u might be short on free RAM. Try closing down all running applications like chat programs, n anything else unnecessary [but don't ever do away with your antivirus or your firewall]. If that dosent solve it in terms of freeing resources, u might wanna disable Aero and give it a try. U can also do a quick reboot to free up resources [this dosen't include Disk drive space].
Hope this helps!