She wants to use my ISP when she is at home. i.e. Use my connection to the web without affecting her ISP settings at university. I do not realy want to set up a wireless network. Can she join to my desk top via a cable and log on that way?
You will need to connect her laptop to your desktop via a Network crossover cable and then set your desktop machine to allow "Internet Connection Sharing". Once conencted run the Network Connection wizard ont he desktop machine and follow the instructions.
Your machine will obviously have to be switched on and connected to allow the laptiop to access the net.