Aaargh, I cannot make this work. I clicked something with the mouse and all of a sudden the computer takes no input from the keyboard. However, when I press 'D' the dock comes up. When I click on an icon on the desktop it is selected as well with other icon I press (like pressing Command). When I switch apps, it autohides the old windows of other apps. When I open another Finder window it minimizes the old one. What to do? Is it some sort of a Universal Access problem?