Sony PCG-NVR23 - Manual (Page 128)

My computer stops responding or does not turn off.
It is best to turn off your computer using the Turn Off Computer command on the Windows ® Start menu. Using other
methods, including those listed here, may result in loss of unsaved data.
 Turn off your computer, click Start on the Windows ® taskbar then click Turn Off Computer and Turn Off.
 If your computer does not turn off, press the Ctrl+Alt+Delete keys simultaneously. The Windows Task Manager
dialog box appears. Click the Shut Down menu, and then click Turn Off.
 If the previous step does not work, press and hold the power button for at least four seconds. This turns off the
power.
 If your computer stops responding while playing a CD or DVD, stop the CD/DVD, and restart the computer by
pressing the Ctrl+Alt+Delete keys at the same time. The Windows Task Manager dialog box appears, and you can
restart the computer from the Shut Down menu.
 Unplug the computer from the AC adapter, and remove the battery from your computer.
Pressing the Ctrl+Alt+Delete keys to turn off the computer via Windows Task Manager or the Windows Security
screen, or turning off the computer with the power switch may result in data loss in files that are currently open.
Page 128