How can I get the touchpad on my laptop to work? I have a Samsung 700z3a laptop. The touchpad used to work until I reinstalled windows 7. I installed the driver on here http://www.samsung.com/us/support/owners/product/NP700Z3A-S06US but it didn't work.
I see multiple drivers listed on the page you linked. Make sure you get the correct (Windows 7) driver.
Alternatively, try reading here, see if any of those suggestions help: