My computer Microsoft logo is on and curser moves around. However, the start button and menu does not come up. Maybe the keyboard locked. The last thing I did on it was turn it on and it said Force shut down and I pressed "cancel" and nothing has happened for a few days now. I've turned it on/off/esc/f8/f2 and tried to take the mouse area and pull up the menu...left the hole computer unplugged for 8 hours...help...Thanks.