Thanks for the quick answer.  Unfortunately Windows 10 forces updates, although there are hacky ways to "hide" them but not without eroding the integrity of the Win 10 install over time. Microsoft is saying the offending driver is OA002Afx.sys Advanced Audio FX Driver (64-bit) from Creative Technology Ltd. which services the SP2309's built in webcam.  I believe the driver is installed with the Dell Webcam App.  Is there a way to obtain an update from Creative?  Their website doesn't show their white label products or drivers. It would be a waste of an otherwise well functioning monitor to be forced to replace because the manufacturer doesn't keep the device driver current with major operating systems.  Its understandable with computer systems with much shorter useful lives, but relatively "dumb" devices like printers and monitors can easily work for decades.  This monitor is only about 6 yrs old.

No. The 2009 monitor was never tested/validated by Dell with any version of Windows 10. You can see on the driver page that we only tested this monitor on Windows XP/Vista/7/8.

The webcam driver and functionality derive solely from the operating system. We never provided specific webcam drivers. The fact that it worked at all in Windows 10 was pure chance. The only workaround I know is to uninstall the KB3176938 update, then somehow tell Windows 10 updates to not reinstall it.

Unknown about the OA002Afx.sys file. You might ask the Windows 10 users on that Forum board. Most Dell devices (monitors, printers, etc.) manufactured before 2013 do not have Windows 10 support.

I began on that forum also but no joy. I know you're just the messenger and its not your policy, but that means some people bought Dell monitors in 2013 who no longer have drivers in Windows 3 yrs later. 

Seconded. I have the same problem with an old monitor and windows 10 and have been forced to unplug the USB from my monitor for my system to function, therefore rendering both the camera and the hub in the monitor I bought unusable.