Sony PCG-GRT250K - Manual (Page 142)

What do I do if the pointer doesn't move when I use the mouse?
 Make sure another mouse is not installed.
 If you are playing a disc, press the Ctrl+Alt+Delete keys simultaneously to stop playback and restart the computer.
 If you still cannot use the pointer, restart the computer. You can restart the computer three different ways:
 Press the Windows key , and press U. When the Shut Down window appears, press R, and then press Enter.
 Press the Ctrl+Alt+Delete keys simultaneously. When the Windows Security window appears, press the Right
Arrow key to select Shut Down. Press Enter, then press R, and press Enter.
 Press and hold the power button. When the computer turns off, press the power button again to restart the
computer.
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