Hello willjsavage, Welcome to PCHF.
Not much to go on there I'm afraid Will. These systems are supplied by Currys and Dixons. Apart from the original driver CD, they don't offer any downloadable drivers.
If we can determine that make and model of your motherboard, we can most likely find the graphics drivers for you since these are integrated. SIW should give you the make and model of your motherboard:
SIW Download
Open and Run SIW. Scroll down to Hardware > Motherboard and you should find the manufacturer and model there.
As for your PCI device. If we cannot identify it, the only option will be for you to open the case, and remove the PCI Card (normally one screw holding it in place). The details of the card is normally written on the front. Apart from your graphics resolution, is there anything else that is not working on you PC?