Using Windows 7 RTM on Sony Vaio is actually the easy one. Every installed program has been run well. But, it is still in a little difficult problem only in display driver. The problem is in the brightness and sleeping computer. Actually, it is caused by the NVIDIA. I found this cause when I realize that by the installed NVIDIA driver in my computer, it will be uncontrolled of its brightness. Not only that, the windows power setting and the FN key also cannot work. But, when the NVIDIA has removed, the brightness would be able to work well and the sleeping function will be in problem.
Finally, I found the solver for this my problem. And of course, I would like to share with you. Because the problem is caused by the installed NVIDIA, it must be solve through the NVIDIA too. In the Windows Device Manager, you only need to disable the NVIDIA. But, you have not to uninstall it, only disable. Then, in the Windows Services, you also need the same thing. It is by disabling and stopping the NVIDIA Display Driver Service. Those two ways may be the simple tips for you in solving your display problem.