Stripped screws on WIFI card

At this point you don’t have many options ;-{

I would seal up the area with masking tape and news paper so the metal shavings don’t get down on to the logic board. Using a Dremel tool at a low RPM I would use a thin grinding wheel to cut a slot across the head of the screw.

But! Before I would even try turning the screws

I would heat up the screw as hot as I could get it without damaging the parts around. This would require first taking the masking tape and anything flammable away and then masking the area again with Kapton tape I would use focused heated air by using a small Precision Butane Torch then I would use a short quirt of freeze spray on the head to cool it so the screw would be shocked breaking the seal to the stud (thermal expansion and contraction).

Using a flat screw tip, the finest one, hold it striaght at the screw and give some solid taps so it makes an indent on the shape of the flathead then screw it out.