zzknight

There seems to be actually very recently updated driver package for that, maybe that's for fixing something recently broken by Microsoft in Wintoys10 updates.
http://www.dell.com/support/home/us/en/04/drivers/driversdetails?driverid=rjxnf
 
You could check Realtek's driver version in Device Manager if it matches to that 6.0.1.8228