My MacBook Pro Retina mid-2014 freezes every 2 days

My MacBook Pro Retina Mid-2014 freezes every 2 days.

I don't know if is for safari, gpu drivers, ... I need to do a hard reset and all seems to work perfectly until the next freeze.

I have executed the Apple Hardware Test and all seems to be OK.

What can I do??? I'm frustrated for the continuous freezing because is a new MacBook Pro.

Regards