My iphone 4s is showing device unknown

i can't activate my iphone 4s as it keeps showing 'device unknown'

Hello Jaywal80,
The article linked below details some useful troubleshooting steps that can help get your computer to properly recognize your iPhone.
iOS: Device not recognized in iTunes for Windows
http://support.apple.com/kb/TS1538
Cheers,
Allen

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    helloooooooooooo
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    Errors related to third-party security software
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    There may be third-party software that modifies your default packet size in Windows by inserting a TcpWindowSize entry into your registry. Your default packet size being set incorrectly can cause these errors. Contact the manufacturer of the software that installed the packet size modification for assistance or follow this article by Microsoft: How to reset Internet Protocol (TCP/IP).
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    Verify that communication to albert.apple.com or phobos.apple.com is not blocked by a firewall, or other Internet security setting.
    Discard the .ipsw file, open iTunes and attempt to download the update again. See the steps underAdvanced Steps > Rename, move, or delete the iOS software file (.ipsw) below for file locations.
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    HP Pavilion tx2500 Notebook PC
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    todays update
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  • Hi, my iphone its in recovery mode and when i restore my iphone 5s loading show the blue screen and show note on itunes (unknown error 14) please i need your help please . thanks

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    In the article Resolve iOS update and restore errors this is what it says about error 14:
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  • Can't activation, in the screen show message device unknown

    hi all,
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    Meanwhile I solved the problem myself: the layout screen had sunk to the bottom, just had to pull it up.

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    Thanks for reaching out to Apple Support Communities.
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    Hey KAYLIEH,
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    iOS: Device not recognized in iTunes for Mac OS X
    http://support.apple.com/kb/ts1591
    Thanks,
    Matt M.

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      If your iPhone does not appear under Devices in iTunes after you connect it to your Mac, refer to the troubleshooting suggestions here:
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