Problem connecting to iphone 6 to itunes

HI, I am having an issue connecting my iphone 6 to itunes. It is a brand new phone that has been set up via iCloud download. When I connect it to my PC it isn't recognised by itunes nor does the PC teem to recognise it (not even charging).

The USB cord works as my partners iphone 6 is recognised, along with both our iPads and even our old iPhones and iPods! The new phone also charges normally through a power outlet not connected to the PC.

if tried resetting iphone, as well as rebooting PC. all software is also up to date . I've checked the USB hubs which is showing it as an unknown device (with an exclamation mark ... I cannot double click on it).

any suggestions???!