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How to fix iTunes: Error 4 (or -4)

1 Answer

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by (11.7k points)

This error can occur when the following conditions:

  • Access to ports 80 or 443 is blocked.
  • Firewall, installing third-party security software, or other Internet access blocking access to servers phobos.apple.com or albert.apple.com .
  • Overloaded server iTunes Store. ^
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