Hi GeorgeilotS,
Welcome to Sony Community!
Did you use a recovery disc or a retail copy of Windows 7? Have you installed the necessary drivers and software for your laptop? Make sure the drivers and software are installed or updated, especially the Synaptics® PS/2 Port TouchPad Driver. Visit this link to get the full list of the drivers: https://esupport.sony.com/US/p/model-home.pl?mdl=VPCZ122GX&template_id=1®ion_id=1&tab=download#/downloadTab.
If the issue is still unresolved, we recommend contacting the nearest authorized service center in your area: https://esupport.sony.com/CA/p/service.pl?.
Best regards,
Vincent
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