Synaptics Touchpad stopped working after a few Windows updates. I do not know which one caused the problem. Synaptics does not appear in Apps & Programs nor in Device Manager. I download the Synaptics touchpad driver from the HP drivers site. I have uninstalled the touchpad device in Device Manager but it never installs the Synaptics driver. I try to update the driver but it never updates. The option to roll back the driver is grayed out. I try to install as administrator but the installation just disappears from the screen with no error message and never finishes installing. This has happened to 4-5 laptops and two different models: EliteBook x360 830 G6 and Zbook. The Synaptics driver is version 19.5.9.45.
I have an older HP EliteBook 840 G3 with a Synaptics 19.0.19.69 touchpad driver with no issues.