Is this onboard graphics with an AMD APU? AMD Accelerated Processors for Desktop PCs
The Catalyst Control Center, etc, is included with that package. I don't have it installed myself, but I think you can update the driver independently. The APU basically lets you use the processing power of the video chip for tasks which benefit from parallel processing. Think of your main CPU as a powerful processor which handles big tasks one at a time. A video processor is basically a whole lot of little processors which can do tiny chunks of work simultaneously.
What happens when you try to update through CCC?