Actually in more and more laptops you CAN upgrade the video chipset. Mainly Dell, Alienware, Sager, maybe a couple others and not necessarily all models. It is also completely wrong to think that laptops can't handle games as well as desktops but you will pay more for sure. Laptops are available with the latest and greatest GPU's from nvidia and ati that will blow you away. Heck I just built myself a new laptop using an MSI barebones notebook system which uses the nvidia geforce 6600 chipset, not top of the line but will smoke any integrated video and handle most current games if even at less than max settings.

But...aside from my babling you should determine what type of video chipset you have, or post the model of your notebook and it can be looked up. Most value notebooks will be integrated and won't handle the likes of oblivion which as said will use every ounce of power your system has to offer.