I had this Problem too,transferring my iPod nano 7G to my shiny new lenovo laptop(Windows 8) from my dads acer nettop(windows 7)
I tried hard to find a solutions,but after a while i found one.
1.Download iExplorer from http://bit.ly/1besThB This transferres your iPod data to itunes coming from the iPod.
2.When its loaded up,connect your iPod to y0ur PC(dont worry if it detects your iPod as a diffrent model,it did that to me!!)
3.when its loaded click 'auto transfer'
4.In the bottom left,click 'Auto Transfer From..'
5.When it asks for a serial just put in NXiY3-CLGW1-KU8NS-AJ6LQ-KUZFJ(it worked for me)
Hey Presto!Just sync your iPod to your iTunes on your new coputer with the imported conten!