Having defined a test program model, the test team constructs a test architecture, which depicts the structure of the test program and defines the way that test procedures will be organized in support of the test effort.
To verify this problem, just connect your iPhone to a different USB port on the computer. Try installing/reinstalling latest version of iTunes. Install the latest version of iTunes (v12.2.1.16) for Windows 10 on your computer.
To fix iPhone 6 constantly freezing after iOS 10/9 on Mac, just run this tool on your Mac and connect your iPhone, iPad, iPod to the Mac. Then Reiboot will automatically detect the condition of your iDevice. Click on Enter Recovery Mode, then click on Exit Recovery Mode to restart your device.