Brand new Acer laptop with Vista and integral broadcom wireless. Refused to connect to wanadoo livebox over wireless although network found and signal strength good. Connected for 5 minutes after turning off security (we/wpa etc) on the livebox. Then disconnected. Keeps trying to reconnect, connecting and then disconnecting wthin 2 seconds. Laptop connected perfectly over ethernet to livebox. Downloaded 80MB of updates and installed. Made no difference to problem. All the time a nearby XP pc connected perfectly via wireless to livebox and formed network with laptop. Any suggestions as to what is hitting the laptop?