I am using a program called Nvidia Inspector to fix this issue with games such as Tomb Raider. But Grand Theft Auto 4 is giving me a hard time.I have tried everything, even Nvidia Inspector does not help in detecting Nvidia Graphics Card.I have an Acer Laptop with Optimus technology which seems to be the cause of this.I welcome any fix or solution.I can even try overclocking. I just want to run GTA 4 on my laptop...