If you are not very clear what to do, you'd better turn to the experts for help.
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After the restart, restore or update your i Phone, i Pad, i Pod Touch with i Tunes as usual.
Besides changing the hosts files to fix the error 3194, you can also stop error 3194 by adjust network settings on your computer.
You may have made it when you update to i OS 8 or i OS 9, but this time you can’t do that anymore.
The program can restore and update i Phone, i Pad, i Pod Touch.
This is one simple way to fix i Tunes error 14 problem. You can always try to restart your device when you meet any problem.
First backup your device and then perform a clean restore of i OS 10.
You’d better use the original Apple Lighting USB that came with your device.
And you can text the USB cable on another computer.