Itunes won't recognise Ipod touch 5G

So this is for my friend who has a 5G, but her Itunes won't recognise the ipod touch 5G, but windows can recognise it, Itunes says to reset the Ipod touch, and she has done this before, and now again it won't recognise it, so she has to reset it, and this is quite annoying her, as resetting takes a long time. my friend had a 4G before, and had no problems with this, she sold the 4G to get the 5G. She has a window 7 laptop. I've tried several ways but it hasn't solved it.

What can we do to solve it ?