Open support assist > go to settings > notification and turn off the notifications.     
On my Inspiron 16 Plus 7610, keep getting notified there is a new update to install: Realtek-High-Definition-Audio-Driver_WWXR2_WIN_6.0.9261.1_A08.EXE Device manager shows 6.0.9261.1 is currently installed and working properly. Can someone tell me how to fix this?  
Keep getting notification from Dell to update driver