Windows 10: Laptop Touchpad no longer scrolls; ASUS Smart Gesture won't work and won't install

When I turned my laptop on this morning I found the usual extra things I can do with the touchpad (two fingers for scrolling, swipe 4 fingers down for desktop, etc.) wouldn't work. I spent the morning trying various things. Updating the Microsoft PS/2 Mouse driver. Deleting the driver. Restarting my laptop over and over.

I had a similar issue before, and it was solved by uninstalling and then reinstalling the ASUS Chipset, ATK Package, and then Smart Gesture. However, I've been unable to reinstall the Smart Gesture as I get an error involving a problem with the Microsoft Installer. I've tried a few different versions of the Smart Gesture and always the same error.

Any help is appreciated!