- Go to http://esupport.sony.com
- Enter your model number.
- Get redirected to http://www.sony-asia.com/section/support
- Enter your model. End up here.
- Run up against brick wall and discover that this laptop that came out in 2006 was originally shipped with Windows XP, and that Sony provides neither Windows Vista drivers nor Windows 7 drivers. Thus, officially, Sony does not support Vista, W7, or W8 for this model laptop. This is their way of saying "Oh, you should purchase one of our NEW SHINY laptops."
So. I guess this would make your question into this.
How do I install a newer operating system on my computer hardware when it is not supported by the computer manufacturer?
First, you ensure the hardware meets or exceeds the minimum requirements of the operating system. Just putting that out there.
What Sony does provide, is a 25mb "software patch" file that you are supposed to download and install, AFTER you have installed the Operating System that is beyond Windows XP. You didn't say anything about whether or not you did this yet. Yes, I know. There isn't one listed for Windows 8. Did you try the one for Windows 7? I mean the closest version of Windows 7 that is listed as an option there on that download page at Sony Asia Support? This one, for example, for Windows 7 Home Premium 32 bit?
The problem with what you want to do, however, is explained a bit by Intel here. In short, Intel hasn't tested the graphics portion of the chipset with Windows 7. So, even Intel doesn't support this discontinued chipset with Windows 7 or Windows 8.
So... why can't you find the hardware drivers for a laptop made in 2006, that support an operating system made in 2012? Because it is 6 years old, and considered to be outdated, and the hardware manufacturers do not support this particular configuration. Microsoft doesn't support any chipsets before the 945 series with Windows 8. They've got a FAQ about that.
Have you considered Linux for it?