Sony VAIO VGC-RA940GN3, User Manual

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Troubleshooting
What should I do if my computer or software stops responding?
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If your computer stops responding while a software application is running, press the Alt + F4 keys to close the application
window.
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If the Alt + F4 keys do not work, click Start , the arrow next to the Lock button, and Shut Down to turn off your computer.
❑
If your computer does not turn off, press the Ctrl + Alt + Delete keys and click the arrow next to the Shut down button
and Shut Down .
If the Windows Security window appears, click Shut Down .
!
Turning off your computer with the Ctrl + Alt + Delete keys or the power button may cause loss of unsaved data.
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If your computer still does not turn off, press and hold the power button until the computer turns off.
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Remove the AC adapter.
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Try reinstalling the software.
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Contact the software publisher or designated provider for technical support.