Hi marcusrolyat,

As this is a Sony Europe forum you will not find drivers for your particular model here.

There are similar GRT models listed on the European support site that have the SigmaTel STAC9750 chipset and you could, at your own risk, try these drivers that are available as both original and updated.

http://www.sony.co.uk/support/en/product/PCG-GRT715E/updates

Rich