Chris T: Thanks!!
Rob C: Not sure if I checked the AV / Firewall on the client - but I did try this: My SPV has wi-fi - I fired up the wi-fi connection - SPV detected the wireless network - I put the WEP key in - SPV authenticated but dodn't get assigned an IP address...
BlueRaJ: There where about 3 PC's in total - one laptop which had the standard Broadcom wireless NIC.