1. Plug iphone USB cable into computer.
2. Open device manager.
3. In the USB section at bottom find Apple device.
4. Right click the device.
5. Click uninstall device.
6. Check box to remove software.
7. Unplug USB and replug into computer.
8. Box will appear asking what to do with this device. Quickly click that box.
9. Another box will open.
10. Select ' open explorer box'
That is now the default for this iphone