Hi Deep,
May I know if the USB 3.0 Host Controller drivers are listed in Device Manager with any exclamation mark?
Let us try to update the chipset drivers and the BIOS. Refer the below mentioned links for the latest Chipset and BIOS:
Chipset - http://dell.to/11zclez
BIOS - http://dell.to/114vSlD
Please ensure that the battery charge is minimum 15% and connect the AC Adapter while updating the BIOS. Also, do not power off the laptop during the BIOS update.
Do let me know the results.