Screw down floating floor

Hi guys.

can I screw down an engineered floor that’s floating over underpayment? There are no pipes etc at the joists so if I can would screw at those points.
 
I suppose the first question is why? Squeaking?

It’s more that I like the idea of the boards being fixed in place. The groove will be glued but I want a belts and braces approach so wondered if they could also be screwed? Have some tongue tite screws. As long as there is an expansion gap around the perimeter and the pipes I can’t see why it can’t be done.
 
It’s more that I like the idea of the boards being fixed in place. The groove will be glued but I want a belts and braces approach so wondered if they could also be screwed? Have some tongue tite screws. As long as there is an expansion gap around the perimeter and the pipes I can’t see why it can’t be done.
What kind of flooring is it? Proper hardwood, engineered, or laminate?
 
I think seeing as nowhere on the internet says about screwing or nailing it must be a hard no. So I’m going to just go with the floating floor as per the instructions and not be a maverick :D
 
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