Thank you so much!  I rolled back the Realtek driver and now Win10 opening screen appears as fast as before.  Lesson learned: instead of calling tech support in India, ask questions in the forum Thanks again.   J-Louis
I have 2 computers towers XPS 8930 and 8940 which are both just over one year old The 8940 displays the Win10 opening screen in 10 seconds every time I start in the morning.  The 8930 did the same thing until one month ago when every time it starts, I get the Dell logo for 2 minutes before the opening Win 10 screen appears.  I did not do anything to the XPS 8940.  Could someone explain to me why the XPS 8930 decided to show me the Dell logo for 2 minutes before starting Windows?  Thanks in advance J-Louis
XPS 8930, Realtek audio driver, slow boot, #2