Sony PCG-FXA36 Manual

If your notebook continues to display the message “Operating system not found,” 
and Windows does not start, use your supplied System Recovery CD to restore 
the software titles shipped with your notebook. See “To use the System Recovery 
CD(s)” for more information.

It is best to shut down your notebook 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. 

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Try restarting the notebook. On the Windows taskbar, click Start, select Turn 
Off Computer, and then click Turn Off.

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If you cannot restart as described in the preceding step, you can restart the 
notebook by pressing the Ctrl+Alt+Delete keys simultaneously and then 
clicking Turn Off on the Windows Security screen.

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If the previous step does not work, press and hold the power button for at 
least four seconds. This turns off the power.

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If your notebook stops responding while playing a CD or DVD, stop the 
CD/DVD, restart the notebook by pressing the Ctrl+Alt+Delete keys 
simultaneously, and then clicking Turn Off on the Windows Security screen.

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Unplug the notebook from the AC adapter and remove the battery pack from 
your notebook.

Your notebook’s operating system may become unstable if it is interrupted or if 
you attempt to make changes before the notebook completely enters a lower 
power state, such as Hibernate. 

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To restore the notebook to its normal operating stability: 

Close all open applications.

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Pressing the Ctrl+Alt+Delete keys simultaneously or turning off the notebook with the 
power switch may result in data loss in files that are currently open.