How do I re-install the apple USB mobile device driver once it has been deleted?

Try these steps:

1. In the Device Manager window, right-click "Universal Serial Bus controllers" and choose "Scan for hardware changes" from the shortcut menu.
2. Locate the Apple Mobile Device USB Driver in this list. If the Apple Mobile Device USB Driver is not listed, continue to step 3.
3. Expand all the sections labeled below (not all sections may be listed):
   • Imaging Devices
   • Other Devices
   • Portable Devices
   • Universal Serial Bus Controllers
4. Look for the entry that recognizes the device as a camera. This entry should be called Apple iPhone, Apple iPad, Apple iPod, or Unknown Device. (Verify the Unknown Device is the Apple Device by unplugging the device and scan for hardware changes again [Step 1] to see if it disappears.)
5. Right-click the Apple iPhone, Apple iPad, Apple iPod, or Unknown Device entry in Device Manager and choose Update Driver from the shortcut menu. (Verify the Unknown Device is the Apple Device by unplugging the device and scan for hardware changes again to see if it disappears.)
6. Click "Browse my computer for driver software."
7. Click "Let me pick from a list of device drivers on my computer."
8. Click the Have Disk button. (If the Have Disk option is not present, choose a device category such as Mobile Phone or Storage Device if listed, and click next. The Have Disk button should then appear.)
9. In the "Install from Disk" dialog, click the Browse button.
10. Use this window to navigate to the following folder:
    C:\Program Files\Common Files\Apple\Mobile Device Support\Drivers.
11. Double-click the "usbaapl" file. (This file will be called "usbaapl64" if you have a 64-bit version of Windows. If you don't see "usbaapl64" here, or if there is no Drivers folder, look in C:\Program Files (x86)\Common Files\Apple\Mobile Device Support\Drivers. instead).
12. Click OK in the "Install from Disk" dialog.
13. Click Next and finish the driver-installation steps. Open iTunes to verify that the device is recognized properly.