I installed Windows 8 on my Sony VPCS111FM laptop. It has an ambient sensor that auto-dims the screen; this sensor is reliant on the video driver working.
The default video driver that came with Windows 8 does not play nice with the sensor, and as a result, my screen is at the dimmest setting. If I disable it and reboot, then the screen is bright, but I get a less-than-optimal resolution.
Google searches reveal that I'm supposed to install the windows 7 drivers Sony provided (as opposed to the Microsoft's default ones). When I install these using compatibility mode, nothing seems to be happening.
I googled around some more, and got Vaio Control Center installed. But the auto-dimmer setting option isn't found under "Display".
I know at least one person got this to work (see the link above), but I can't seem to figure it out.