If you're unable to connect your Apple iPhone to your computer, check to make sure your phone is not locked with a passcode. If it is, unplug the iPhone from your computer, enter your passcode on the phone, and then plug the phone back into a USB port on your
Windows should now recognize the device, allowing you to perform tasks such as transferring photos, music, and other files between your iPhone and your computer. http://windows.microsoft.com/en-US/windows7/Why-cant-I-connect-my-iPhone-to-my-PC
If still computer does not detect the phone follow method 2.
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Hope this helps.
Thanks and Regards: Shekhar S - Microsoft Support.
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Thanks and Regards, Shekhar Sharma
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