How to Fix iTunes Error 1667 When Updating or Restoring Your iPhone

iTunes error 1667 usually appears when you’re trying to update, restore, or sync your iPhone through iTunes—and it suddenly fails. The cause could be anything from a bad USB cable to outdated software or even an aggressive antivirus program blocking iTunes. Here’s how to troubleshoot and fix it.


1. Check the USB Cable and Port

A faulty or unsupported USB connection is a top reason for error 1667.

  • Use an Apple-certified Lightning cable.
  • Avoid USB hubs—plug directly into your computer’s USB port.
  • Try a different USB port or another cable if available.

2. Update or Reinstall iTunes

Outdated iTunes versions can cause errors with newer iOS devices.

  • On Windows: Open iTunes > Help > Check for Updates.
  • On macOS: Use Software Update in System Settings.
  • Or uninstall iTunes completely and download the latest version from Apple’s official site.

3. Temporarily Disable Antivirus or Security Software

Sometimes third-party antivirus programs or firewalls block iTunes from syncing.

  • Turn off any antivirus or firewall software temporarily.
  • Reconnect your iPhone and try the update or restore again.

Don’t forget to re-enable your protection after the process.


4. Restart Both Your Devices

Rebooting clears temporary system glitches on both ends:

  • Restart your iPhone.
  • Restart your computer.
  • Reconnect and open iTunes again.

5. Ensure a Stable Internet Connection

Unstable Wi-Fi or network interruptions can cause the error.

  • Make sure your Wi-Fi or Ethernet connection is solid.
  • Avoid public or unsecured networks during the update.

6. Try a Different Computer

If all else fails, try connecting your iPhone to a different Mac or PC with iTunes installed. This helps rule out system-level issues on your main computer.

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