If the device is not connecting to iTunes, remove the utility from your computer (Control Panel > Uninstall a program), run a registry cleaner to make sure that there are no leftover registry keys in your system and download and install the latest version of iTunes from the official web page. Next, press Windows + Pause/Break key combination, open Device Manager, expand the Universal Serial Bus controllers list, right-click on the driver and select Uninstall. Reboot your computer, connect the device using the USB cable and press Scan for hardware changes icon from Device Manager. After that, use the instructions provided by the Support team to restore the iPhone 3G software.
