Can not move anything in Ubuntu 12.04

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http://askubuntu.com – This is quite annoying. For some reason I can not hold anything with my mouse. For example. I can not drag a window by holding its title bar. I can not move the scroll bar of any window by mouse. I can not even select text Alt+Click on a window does not move it. All these tasks are related to dragging. And this dragging is not working. The problem steps are, Left click anything but dont release it Move the mouse now. At this time it'll appear that you didn't left click earlier. So your mouse moves but no text is selected or not nothing is moved/dragged that you clicked earlier. (HowTos)