Be careful with upgrading drivers for that internal GPU. I have a different internal GPU on the same system, and TG2 crashed all the time after updating for better skies in the preview. So I reverted back to the initial drivers, and the sky is not good, but it doesn't crash anymore.
I think after all, you might even be better off with an extra graphics card, but I'm not sure. I use mine for rendering only, so I don't have to see the sky anyway.