I've seen comments about reinstalling Touchpad drivers. This model does not seem to have any in the listed driver via the download page
Someone here also had this issue but didn't get a response
Did you download all the windows 10 drivers from Dell after upgrading? They are here including Quickset--
Not just Quickset, Intel rapid and Serial IO, are you saying that the Support Assistant is not to be trusted with downloading and maintaining the required/optional drivers?
If this is the case, I'll uninstall it and download all drivers from the link provided and manually install all of them and get back to you with the results.