Michael has a ten-year-old HP laptop that he finally upgraded to Windows 10. But in doing so, his trackpad isn't operating properly. The scroll feature isn't working. Leo says that Synaptics trackpads need a driver to work with Windows 10, and most likely, HP will be the source to get that. If it doesn't, then you're out of luck with a ten-year-old computer.
But that computer is a great candidate for Linux, which has flavors that can work with older hardware. And since it's open-source, it's kept up to date by enthusiasts.