Sony PCG-GRX690K - Manual (Page 70)

 If you still cannot restart your computer, press and hold the power button for more than four seconds to turn off the
computer.
 If the pointer does not move while playing a disc, press Ctrl+Alt+Delete simultaneously to stop playback and
restart the computer.
 If you are still experiencing problems, make sure another mouse was not installed.
 You may need to use your supplied Application Recovery CD(s) to reinstall the touch pad or mouse drivers. See
Using the Application Recovery CD(s) for more information.
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