did you trying going into your control panel and click on touchpad settings (might be under mouse)?
I am trying to turn off palm check and the Synaptics tab is not showing. I have the latest Dell touchpad driver and am currently running on Windows 10.
The first photo shows the no Synaptics tab problem.
The second shows going into the actual icon, if I click on the properties nothing pops up. I have tried uninstalling and reinstalling drivers.
If anyone has any ideas that would be awesome.