Re: Sony VGN-Z690NAX

Hi Wjyang,

Welcome to Sony Community!

This laptop has no ASSIST button. May we know why do you need this button? You may also want to tell us a brief description of the issue for us to provide you an accurate solution. 

Please visit this link for further assistance, https://esupport.sony.com/US/p/model-home.pl?mdl=VGNZ690&template_id=1&region_id=1&tab=howto#/howtoTab

Regards,
Jen

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