Hello KartikTambi,
I do apologize of the above steps did not work for you. Here's another one lets try to uninstall the driver from the device Manager Instead by following these steps.
* Try to right click your START button and go to DEVICE MANAGER.
* Go to Universal Serial Bus Controller.
* Right Click the one with APPLE in it and select uninstall device.
* Restart the PC for the changes to take effect.
* Plugin your phone back and mark it is TRUSTED DEVICE and lets see if the PC will now be able to detect it.