My limited experience of touchpad drivers to date suggests that they will show up in "Programs and Features" (which you can access through Control Panel or by right clicking on the Start button) & you can uninstall them from there.
Another way of uninstalling drivers (which unfortunately won't work for you in this instance) is to right click on the item in "Device Manager" & select uninstall.
Another way (but probably not usable for you in this case as you have been using the machine for a while) is to create a system restore point before you install a driver - you can then restore the system to that state if your driver install doesn't work.
However I'm not convinced think that drivers are your problem as on a clean install a touchpad will normally work with just the Windows provided mouse drivers - there will be no touchpad settings available but the cursor moves & the buttons work & the device shows up in Device Manager as a mouse.
So I would suggest you consider backing up your data, ensuring that you have installation files or disks for any software you own & doing a clean install of Windows 10 - as in my experience upgrade installs can be very troublesome - one of mine "lost" the DVD drive - but it reappeared when I did a clean install.
(You can download Windows 10 installation media using the Media Creation tool - as you have already installed it once on your machine the same version (I.e. Home or Pro) will re-activate automatically when re-installed on your machine - just select "I have no product key" when you are asked early in the install process.