Help with jailbreaking and Cydia for iPhones, iPads, and iPod touches.

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How to fix some mysterious problems.

Hi i tried to jailbreak my iphone 3gs using green poison. everytime i try to put it into DFU mode a pop up box says that the apple device driver not successfully loaded and asks to try and install device driver but then it says could not find device driver....please help !!!!

asked 01 Mar '11, 05:55

hburtonr's gravatar image


re-install iTunes.

(01 Mar '11, 05:57) coupeborgward coupeborgward's gravatar image

Its possible to give manually the driver location by doing the following:

  • Double click the USB devices icon next to the time/clock in the lower right corner.
  • Select the device from the list of USB connected devices, then click "Properties".
  • On the USB device properties windows click the "Driver" tab.
  • Click the "Update Driver" button.
  • Next tell windows not to connect to Microsoft site or find the driver automatically.
  • Next specify the following location for the driver: C:\Program Files\Common Files\Apple\Mobile Device Support\Drivers
  • The PC should install the driver and you can try again.

If the above doesn't work you can try to remove iTunes and reinstall it, the proper way includes removing the iTunes components in the following order before reinstalling:

  • iTunes
  • QuickTime
  • Apple Software Update
  • Apple Mobile Device Support
  • Bonjour
  • Apple Application Support

More details on removing and reinstalling at


answered 01 Mar '11, 06:19

knightz4u's gravatar image


thankx knightz4u, i have just tried again, i ended itunes and itunes helper, but still the same, when i am on the last part of DFU mode that is when the windows pop up box appears then the iphone will not switch on, as for manually doing the driver, nothing is showing up as being connected, thankx anyway

(01 Mar '11, 06:34) hburtonr hburtonr's gravatar image

From your comment i can tell you are properly entering DFU mode however the driver is not the correct one, if you go to the Device Manager you will find a new device is added under one of the categories as a camera or a portable device (you can make sure by observing the changes as you unplug the device).

Once you identify the wrong device listing of the DFU mode, connect your device, turn it off and enter DFU mode, observe the device listing appearing in the Windows Device Manager, right click it and update the driver selecting the driver location as in my answer above, this should solve it.

(01 Mar '11, 06:43) knightz4u knightz4u's gravatar image

Hi Knightz4u i have tried again this time when it asks me to locate and install i typed in your address: C:Program FilesCommon FilesAppleMobile Device SupportDrivers and it installed the driver and GP asked me to click on jailbreak and HEY PRESTO 1 JB iphone, many thanks for the info much appreciated

(01 Mar '11, 06:52) hburtonr hburtonr's gravatar image

Glad I could be of assistance to you.

(01 Mar '11, 06:57) knightz4u knightz4u's gravatar image
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Asked: 01 Mar '11, 05:55

Seen: 2,462 times

Last updated: 01 Mar '11, 06:57

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