Do you have the Atheros or Intel adapter? Any Windows 7 drivers will have to either come from the wireless chipset manufacturer or you'll need to run the XP driver inf. If it's not compatible, then the manufacturer is the only option. There are apparently no Windows 7 drivers for that unit as Windows 7 was released long after that product was manufactured.
The WiMax, Atheros wireless and Intell wireless XP drivers are here:
http://www.samsung.com/uk/support/model/NP350E7C-A04UK
If we knew what your hardware id for the wireless device was, we could possibly find a Win7 driver, maybe. Try looking at Administrative tools, System information, Components, Network, Adapter, and see if the hardware id string or common name is listed for your...