Mac problem where I can't click on the Dock items and other functionality

Question

I'm currently using Mac 10.5 and suddenly, the icons in my Dock are unresponsive. The functionality which disperse all my windows is not working either(it's the F3 functionality from the keyboard). Does anyone know if maybe I have activated some locking mechanism by accident? I can access the top menu bar of the OS as well as existing opened windows.

Answer 1

It looks like your dock has died. If you can get into Terminal (Applications > Utilities > Terminal, I think), try sudo killall Dock. This'll crash-close the Dock, and it should restart happily. If it doesn't, logout and back in again.