If you can't transfer pictures, music or videos between your device and PC, view this info on resolving conflicts.
Start Device Manager.
For detailed instructions and older operating systems, refer to Opening Windows Device Manager.
The following devices are normally installed:
Depending upon the selected USB connection (e.g., Media device, Camera, USB debugging), some of the devices may not appear.
If a red X, yellow ! or yellow ? is displayed to the left of a listed device, a conflict is present and the drivers must be updated or reinstalled.
Driver conflicts may also be indicated by a device entry labeled Other Devices or Unknown.
If a conflict is present: