I have installed recently Windows Vista 64 bits on my VGN FZ11M Vaio. The original operating system was Windows Vista 32 bits. I need to re-install the NVIDIA GEFORCE driver for the Windows Vista 64 bits and only drivers for the 32 bits Windows Vista are available. Please let me know where I can find driver(s) for Windows Vista 64 bits. Thanks!
If there are no 64 Bit drivers available from Sony for the Nvidia chip for your model you will need to install drivers released directly by Nvidia. To do this it will be necessary to use a modified INF file for the system to allow installation.
Have a look at the following link and read the quick start guide towards the bottom of the page on the right hand side.