It may show a Com port, but you need to use the correct driver, I believe it is 3.2.02. It is an older driver but the only one that works properly for the radio. Check the faq page for more information.
-----Original Message-----
From: Richard Lewis <richardlewis115@gmail.com>
To: Discussion of CHIRP <chirp_users@intrepid.danplanet.com>
Sent: Fri, 01 Jan 2016 18:41
Subject: Re: [chirp_users] Baofeng GT-3 Mark-II
John - I'm on Windows 10 also. I purchased a different cable which is supposed to eliminate problems:
http://www.amazon.com/gp/product/B00HUB0ONK.
I'm not sure that was needed but apparently cables can be an issue. It sounds like you are not really connected to the radio. Be sure the double pin plug is fully inserted - they can be sticky and only go part way in.