By this I understand that syncing has worked on their family PC (running Windows 10) in the past, but updates may have been run / fiddling may have taken place since the last successful sync. One of the parents already has an identical model which was "working fine" (although hadn't been synced for over a year). I have a used iPod Classic 5th Generation (A1136) that was purchased for a parent as it is compatible with all their 40-pin gear.