PC with Windows XP Home won't connect over Wi-FI
We have a PC running Windows XP Home that just won't connect to our network.
This PC isn't ours as it belongs to the Nursery. To enable them to have net and email access I've been asked to connect it to our wi-fi Network.
The PC had no Anti-Virus software (and loads of "issues") So using Sophos I removed the 24 "issues" and Sophos is now working(but unable to update itself.)
The Wi-Fi Access Point is a Planet WAP-4000. We're using a WEP with a 26 character HEX key.
The USB adapter is Belkin F5D7050 54G USB Wireless Adapter. I've tried Wi-FI confuguration using both the Belikn utility and Windows XP's own configuration. I can see the Network and put the password in but it just refuses to obtain an IP address.
The school Wi-Fi network is listed but refuses to connect.
My own Windows Vista Home Premium laptop connects with no problems.
Any ideas of what to try to do?