Recently, I bought a new battery and power cable for my laptop. Both worked fine. Also at this time I installed the synaptics program after not having had it installed for a few months after a reformat. Well a few days later, my touch pad simply stopped working after my computer was plugged into power. Sometimes it'd interpret finger movements as double clicks or even more. But as soon as I unplug the computer, the touch pad immediately starts working again. A day ago I reformatted my laptop again due to slowness and now the touch pad works no matter what. I plug in the computer to power and it just keeps on working. So I'm wondering. Is it the Synaptics program that makes it stop working? If so, how do I fix it? I like have the additional features of the program. Like scrolling with the edge of the touchpad and turning off double touch to click+hold.

Fn + F7 didn't work for me... but experimented and Fn + F9 did!

Hope this helps!

I have an Inspiron so all my FN possibilities are on the keyboard. But the problem isn't that it shuts off. It starts glitching really bad. And now I found out that it works fine if I leave an external mouse plugged in. Otherwise it just slowly stops working and then starts thinking I'm always double tapping