Hi there, I had the same problem today! I had to remove my security as it was interfering the the wireless connection, it started after allowing an update from microsoft.
After being on phone with SKY they asked me to remove my security from 'add /remove programes' and then try reconnecting the wireless before putting it back on. I had to re-start firewall and IP connects back to default before reconnecting aswell. It has worked for me x
If your daughter is able to talk to her broadband provider they may be able to talk her through it as I am useless at this kind of thing! Hope it helps