The touchpad on my Pavilion G6 randomly freezes. Sometimes it starts to work again after a few seconds, sometimes putting the laptop into standby cures it, but usually I have to reboot.
I'm running Windows 8.1, though I had the same problem before the upgrade from Windows 8, I've just been putting up with it. I haven't made any hardware changes to the laptop since it was new.
I've uninstalled the touchpad drivers and installed the latest ones but the problems remains.