I know there were a lot of threads like this back around 2007-2008. My computer is a macbook, I got it Christmas 2008 with 10.5.8, installed 10.6.8 on it. Intel Core 2 Duo, etc. Ok. I had the problem where the clicker is always stuck: on desktop, it keeps drawing selection rectangles, when I click on something, its hard to deselect and will usually drag it. I tried resetting SMC and other stuff, like: https://discussions.apple.com/thread/2539560?start=15&tstart=0 "1 shutdown 2 connect power adapter 3 press and hold left shift + control + option, press power button once, wait 5 seconds 4 press and hold command + option + r, press power, hold p until second chime" I tried resetting the pram using the instruction from apple: http://support.apple.com/kb/HT1379 didnt work. I tried going into trackpad, I turned 2 finger off, and that created the opposite problem. Clicker would hardly click anything. I'm messing with it right now. Only zoom and clicking are selected in Trackpad. I tried using the computer with the battery removed because someone mentioned a swollen battery might be the cause. Nope. What should I try next?