Sony PCG-R505ELP VAIO User Guide (primary manual) User Manual page 109

My computer stops responding or does not shut down.
It is best to shut down your computer using the Turn Off Computer command on the Windows Start menu. Using other
methods, including those listed below, may result in loss of unsaved data.
 On the Windows taskbar, click Start, select Turn Off Computer, and then click Turn Off.
®

If your computer does not shut down, press the Ctrl+Alt+Delete keys simultaneously and click Turn Off Computer on
the Windows Security window.

If the preceding step does not work, press and hold the power button for at least four seconds to turn off the
power.
 Unplug the computer from the AC adapter, and remove the battery pack from your computer.

If your computer stops responding while playing a CD or DVD, press the Ctrl+Alt+Delete keys simultaneously, and
click Turn Off Computer on the Windows Security window.
Pressing the Ctrl+Alt+Delete keys simultaneously or turning off the computer with the power switch may result in data
loss in files that are currently open.
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