My system is now "frozen". On the screen is my two ientities. The mouse pointer is located midway between them and WILL NOT move. I downloaded a NVIDIA update last nigth that may be the culprit, but I cannot do anything because the computer is frozen. There is a round blue icon lower left of the screen the looks like a blue clock. I am not sure it was there before. Any help is greatly appreciated. The mouse is not wireless, teh light is on in the mouse, it is just as if the buttons do not work.