iphone keeps disconnected from pc

Hi,

I tried to backup my iphone to my laptop. My iphone kept disconnected from my pc. I can only see my iphone for a few seconds, after I type the password on my phone that I trusted my computer, it then disconnected me. After a few seconds, my iphone showed again on my itunes then disconnected again. My laptop is running Windows 10. I tried different USB ports and it seemed to be happen all the time. I tried different USB cables (even with Apple cables), updated my itunes, restarted my computer, reinstalled itunes, plug in and plug out the phone from the USB ports. The problem stayed the same. Currently I am trying to use Sync with this phone over Wi-Fi and it looks like it is finally connected with the phone and is started to backup. However, does anyone has similar problem? or how to resolve this?

Please advice.

Thanks,

Elsie