1 Reply Latest reply: Nov 9, 2013 7:21 AM by jeremy_v
rj-rere Level 1 Level 1

I have the following problem; whenever I tried to authorize my computer there is an error the problem box says : we could not complete your I tunes request an unknown error occurred  (-50)?? I really need help. I need to sync my Iphone ??

iPhone 4, iOS 7.0.3
  • jeremy_v Community Specialists Community Specialists

    Hi rj-rere,


    Thanks for visiting Apple Support Communities.


    There are several reasons that you might receive an error -50 when using iTunes. This error usually means that your iTunes Store connection has "timed out."


    The steps in these articles can help with resolving the error:


    iTunes Store: "Error (-50)" when downloading purchased content


    This can happen when a connection timeout occurs while you're downloading purchased content from the iTunes Store. For example, certain types of software may affect how a computer sends and receives information from the Internet:


    • Firewalls
    • Web Accelerators
    • Ad Filters
    • Virus Protection Software
    • Resolution


    If you have any of the software listed above and you can't access the iTunes Store or complete your download, you'll need to configure the software to allow iTunes to connect to the Internet and to allow the following domains to send and receive data from the Internet:


    • itunes.apple.com
    • ax.itunes.apple.com
    • albert.apple.com
    • gs.apple.com
    • deimos3.apple.com
    • phobos.apple.com


    Refer to the documentation that came with that software and, if necessary, contact the software's manufacturer.


    You can also try these steps:


    • If a web accelerator could be causing the issue, contact your Internet Service Provider (ISP) or the software manufacturer.
    • If your computer is on a network, try using a different computer on the network or discussing the issue with the network administrator.


    iTunes: Specific update-and-restore error messages and advanced troubleshooting


    Error 13, 14, 35 and 50 (or -50)


    • Eliminate third-party security software conflicts.
    • There may be third-party software installed that modifies your default packet size in Windows by inserting one or more TcpWindowSize entries into your registry. An incorrectly set default packet size can cause this error. Contact the software manufacturer that installed the packet-size modification for assistance. Or, follow this article by Microsoft to reset the packet size back to the default for Windows:How to reset Internet Protocol (TCP/IP).
    • Connect your computer directly to your Internet source, bypassing any routers, hubs, or switches. You may need to restart your computer and modem to get online.
    • Try to restore from another known-good computer and network.

    Best Regards,