1. Restarting the computer can solve many problems. Restart the computer and reconnect the iPhone, iPad or iPod touch.
2. Please update iTunes to the latest version, and then try connecting again.
3. Verify that the device is connected to the high-power USB 2.0 port on the computer. Do not connect the device to an external USB hub, but connect it directly to the computer. Check whether your computer is equipped with USB 2.0 port.
4. Connect your device to other USB ports on the computer, preferably the USB port at the back end of the computer host. (This error is mostly caused by USB interface problems. )
5. Connect your device with another Apple 30-pin USB cable.
6. Verify that the computer meets the minimum system requirements. IOS devices require the following minimum versions of Windows:
Windows XP Service Pack 3、Windows Vista、Windows 7
If you have the above version of Windows, please verify that Windows has been fully updated to the latest version by downloading and installing software updates from Microsoft.
7. Check the base interface of equipment and cable for fluff or other debris.
If there is fluff or debris at the base joint, please clean it with a clean, dry and soft brush. Carefully brush the base interface with a brush to prevent fluff or debris from entering other interfaces of the equipment.
8. Disconnect the computer from USB peripherals other than the keyboard and mouse.
After disconnecting from these peripherals, restart the computer and connect the devices, and then open iTunes. Examples of other USB peripherals include, but are not limited to, printers, cameras, scanners, external hard drives, USB hubs, card readers, USB Wi-Fi adapters, or cellular data wireless network cards.
9. Use Task Manager to stop some Apple services:
Start the Task Manager:
Windows XP: press Control+Alt+Delete on the keyboard.
Windows Vista and Windows 7: press Control+Alt+Delete on the keyboard. Then click Start Task Manager. If Windows needs your permission to continue, click Continue.
Click the Processes tab of Task Manager. Click the name of each process below, and then select End Process. When these processes are completed, restart the computer, open iTunes and test.
iTunesHelper.exe
AppleMobileDeviceService.exe
iPodService.exe
10. In some cases, it is necessary to restore your device, especially when this problem occurs on multiple computers and all the above steps are ineffective.
Restore your device. After the recovery is completed, please restore from the latest backup.
1 1. Connect your device to another computer to determine whether the problem appears on your computer.
If the problem only occurs on one computer
(1) Sometimes running out-of-date drivers on Windows computers may cause this problem. Ask the manufacturer of the computer or computer motherboard if there are any available USB chip driver updates. Learn more about updating Windows drivers.
(2) Determine whether the problem affects a specific Windows user account or all accounts. According to your operating system, follow these steps to create a new user account:
Windows XP
1) On the Start menu, select Control Panel.
2) Open the user account. Choose to create a new account and follow the instructions to complete the account setup process.
3) After creating a new account, select Logout from the Start menu.
4) Log in to the newly created user account.
5) Open iTunes to determine whether the problem you encountered still exists in the new user account.
Windows Vista or Windows 7
1) On the Start menu, select Control Panel.
2) Open Add or Delete User Accounts (if you use Classic View in Windows Vista, please open User Accounts and then open Manage Other Accounts).
3) Choose to create a new account and follow the instructions to complete the account setup process.
4) After creating a new account, select Logout from the Start menu.
5) Log in to the newly created user account.
6) Open iTunes to determine whether the problem you encountered still exists in the new user account.
(3) If the problem still exists under multiple user accounts, please uninstall and reinstall iTunes.
(4) In some cases, expired or misconfigured security software can also cause this problem. Eliminate problems that may be caused by third-party security software.
If the problem occurs on more than one computer
(1) Make sure you have tried another known-good Apple 30-pin USB cable.
(2) If the computers you use to test the equipment are of the same brand and may be purchased at the same time, then the cause of the problem may still be the computer problem. This may happen if you test multiple computers in a business environment.
Please check with the computer manufacturer or company's system administrator whether there are any available USB chip driver updates.
If the computer used for the test is configured by the system administrator, or if you configure the same software on multiple computers at home, the problem may be caused by outdated or misconfigured security software. Eliminate problems that may be caused by third-party security software. In addition, when touch is turned on, keep pressing the power button and the home button to restore the system for storage!