Originally Posted by
Alickiman I have tried a different pc but not a different cable. I'll try a different cable and report back.
I'm sorry to tell you this but it's neither up to your PC nor the USB cable, but your phone. To be exact the problem is that you have hard reseted it and somehow the OS got corrupted. Only solution is to go back to 8.1 using Windows Device Recovery Tool, upgrade again to WM10 and not hard reset it. If it's gonna make you feel better you're not the only one with this issue, i'm suffering from it too.
You have detailed instructions here how to do it.
FAQ - How can I recover/reset/restore my phone software? - Microsoft - USA