First Try Holding down the Power Button for 20-ish Seconds, and See What It Does,(It May Shut Down, Restart or Ask you What to Do.)
Press CTRL+ALT+DELETE then Use the Tab Key to Select Task Manager, Quit All Programs, .
If that doesn't work Repeat those steps, and choose restart. If All Fails Pull Out the Battery, and disconnect from power-l(laptop). Or Disconnect From Power-Desktop.
Joe, December 2008