Hi Mulnob,
Welcome to Sony Community!
We're saddened to hear that since the Assist button is very important. Please make sure that your VAIO computer is compatible with Windows 10 operating system and that there are drivers to support it on Sony website.
To help you with this, we highly recommend visiting our Sony Global Web site for information on contacting the Sony Support Center in your region at http://www.sony.net/SonyInfo/Support/.
Regards,
Jen
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