Question: I have an Acer Aspire 5532, and it used to have a scroll option on it, on the side of the touchpad. I used a regular mouse plugged into the USB drive for a while, with the touchpad disabled, but it broke and I'm back to using the regular touchpad. however, somehow the scroll option got disabled and after quite a bit of trying I still can't figure out how to re-enable it. does anyone know how?

Answer: 
It worked for me after I installed this driver: [TouchPad Synaptics driver](http://www.synaptics.com/en/drivers.php).
Press `fn` + `f12`/`scroll lock`, it should then unlock the scrolling bar.