My SD Card Reader is no longer working.  In Device Manager: Realtek PCIE CardReader has a warning triangle, status says 

This device cannot start. (Code 10) 

{Operation Failed}
The requested operation was unsuccessful.

Device PCI\VEN_10EC&DEV_525A&SUBSYS_06E41028&REV_01\4&4435631&0&00E1 requires further installation.

Dell Diagnostics reported no problems with this device.  The driver is up to date.