Options to fix the Touch Pad:
❑ You may have disabled the touch pad. Press the Fn+F1 keys to enable it. (This is what happened to me. Not sure how that happened though.).
I've also had to power-off and then back on again to get the touchpad to work.
Other options per Sony's Vaio Manual - haven't tried most of these:
❑ Make sure that a mouse is not connected to your computer. (DigitalQA - This shouldn't matter.)
❑ If the pointer does not move while a software application is running, press the Alt+F4 keys to close the application window.
❑ If the Alt+F4 keys do not work, press the Windows key once and then the , key several times, select Restart with the M or m key, and press the Enter key to restart your computer.
❑ If your computer does not restart, press the Ctrl+Alt+Delete keys, select the arrow next to the Shut down button with the m and , keys, press the Enter key, select Restart with the M or m key, and press the Enter key to restart your computer.
❑ If this procedure does not work, press and hold the power button until the computer turns off.
Source: Sony Vaio Manual
Click here for another source if needed (haven't verified any of these though).
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