Thanks for the responses, much appreciated.
I've just switched ISP, and the problem gets stranger. I have 2 laptops, both Fujitsu Siemens, one with Vista Home Basic and one with Vista Home Premium.
The ISP is BT, it's the BT Total Broadband Anywhere package, which comes with a VoIP phone and a mobile with wireless facility. The Vista basic laptop, handset and mobile all connect fine to the hub. This laptop I'm on now will see the hub but the signal is zero, it won't connect using the built in wireless adaptor.
It works with a cable, and I'm currently using a Belkin 802.11g USB dongle. I've checked the drivers on the Fujitsu Siemens website and apparently they're the most up to date. A technical advisor from BT helped me to configure the hub last night and connected to my screen via a Citrix server to look at the settings on the PC. She thought they were OK and said that there might be a problem with the adaptor. She also noticed that the PC was running at close to 100% CPU usage and 60/70% memory capacity. I'll attach task manager info with this message as a pdf of screen shots.
I haven't tried my desktop yet but as the Belkin dongle works OK on this laptop I'm hopeful that it will be fine on the PC.
As the retailer is close to useless, can anyone offer any info as to what I might try next, before I go and chuck this laptop through a grinder and scatter the debris around the shop? I'm just at a loss as to what to try next, something just doesn't seem right given that the laptop can see the hub but won't connect but I can't think what it is.
Thanks in advance-