answer may be in those other threads, but as I recall, the more common answer is waiting for updates on driver files, or reinstall the driver files which may have been removed during the w10 install. You would get them from your computer manufacturer.
I bought a new Acer Aspire E5-571G notebook a few weeks ago without any operating system. I installed windows 10 but now my touchpad wont work correctly, I can't even scroll. I tried downloading the latest Synaptics driver and also tried downloading it from the acer site but even though it tells me that the drivers are updated, they arent. Any suggestions what might help? http://p42.imgup.net/mehcd6f.png