Enabling touchpad/trackpad gestures after Windows 8 update?

I have an HP dm4. My touchpad has lost some functionality after the update to 8: I can't use the scrolling gesture, and the cursor moves slowly. But that's kind of a different point. Are there generic drivers available to enable Windows 8 gestures? Or do I have to wait for HP to update drivers? HP's support assistant was pretty worthless.

And in general... is anyone else having trouble figuring out if/what drivers for your laptop need to be updated?