I have an Iphone 5S and used to sync it to my computer in the past without any problem, but now I can't and appears the message "usb device not recognized", and the cable is good and so the USB port. Do you have any idea what's the problem?

I have an Iphone 5S and used to sync it to my computer in the past without any problem, but now I can't, and appears the message "usb device not recognized", and the cable is good and so the USB port. Do you have any idea what's the problem?

Try leaving it plugged in and then restart the computer.
If you are on Windows this link may help but it is a bit old.
http://www.technologynext.org/error-usb-device-not-recognized-how-to-fix/

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    Start here:
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    Post relates to: Tungsten E2

    Hello!
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    Post relates to: Treo 650 (Unlocked GSM)

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    Have had my Tungsten E2 for 3 years...I always use cable to Hotsync, and the last few weeks it has worked only intermittently. Either the device is not recognized, or it starts the HotSync and then freezes.  I have checked out various online suggestions but then discovered that the only thing that seems to  work is to exit Hot Sync Manager, then restart it again each time - then Hot Sync seems to work fine - a temporary solution! I don't have Bluetooth capabilities.  I can't figure out if I need a new cable, a new OS (have Vista), a new laptop (only 2 years old) or a new Palm!  Any suggestions? Thanks!
    Post relates to: Tungsten E2

    Hello!
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    Post relates to: Treo 650 (Unlocked GSM)

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    This morning when I tried to sync m y Z22, I got "USB DEVICE NOT RECOGNIZED".  Connected the cable to every one of my USB ports, tried to sync each time but got the same message. 
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    Post relates to: Palm Z22

    try to update the driver in your device manager.. right click on palm handheld then update driver...
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    Type  “start devmgmt.msc” (without the quotes) then press enter. The Device Manager should open.
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    Expand Palm OS Handheld (if available) and uninstall all PalmHandheld.
    Right+Click on the PalmHandheld.
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    Repeat Steps A and B until all PalmHandheld are Uninstalled.
    Expand Other Devices (if available) and uninstall all Unknown Devices.
    Right+Click on the Unknown Device.
    Click Uninstall.
    Repeat Steps A and B until all Unknown Devices are Uninstalled.
    Expand Universal Serial Bus Controllers and uninstall all Unknown Devices.
    Right+Click on the Unknown Device.
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    Repeat Steps A and B until all Unknown Devices are Uninstalled.
    Close the Device Manager.
    Restart the Computer.
    After Restart, wait for all the components to be loaded on the System Tray especially the Hotsync Manager.
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    Post relates to: Centro (Unlocked GSM)
    Post relates to: Centro (Unlocked GSM)

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