My Mouse Will Move but Not Click

I can't think of anything to tell you. Try setting up an appointment with a Genius at your local Apple store. To set up an appointment, fill out the form here.

http://www.apple.com/retail/geniusbar/

Shut down the computer. Unplug the power adapter if you've got it connected. Take out the battery. If it's an intel just leave it without any power source for about 20 seconds before replacing the battery and powering back on. If not an intel, same process, just hold down the Power button for 5 or so seconds while you have the battery out. This is going to reset SMC/SMU. If this doesn't work, definately take it in for someone to look at.

I'm having the exact same problem and have tried PRAM reset and taking the battery out as you advised. It looks like it's a trip to the friendly neighborhood Apple store. Funny thing is, I recall having this problem before and being able to solve it by removing the battery, etc. but this time it seems to be here to stay. I inquired at the Apple store what might be wrong and they said the clicking mechanism is probably shot, which means replacement for about EUR 230. That's not good. I will post again once I have more info.

i have the same thing and for some annoying reason, it wont start up from disk!

Please forgive me if this seems too simplistic, but has anyone checked their System Preferences> Mouse/Keyboard set up.
Also look at the bottom of System Preferences in the "other" category.
I have used aftermarket keyboard/mouse systems with my MacBook and had to install their software which in turn created a separate Mouse/Keyboard icon in System Preferences under the Other topic at bottom.

Good Luck All.

Adam