This amount of dust in a PC should not be possible. Does she lives in a desert? What even is this, the filter of the case?
It's the intake filter for a computer tower that has never been cleaned: imagine if you never emptied the dryer lint catch in a clothes dryer. Makes for a toasty, smothering experience for a computer (it's way worse for a smoker's computer, the tar and nicotene form crusts over everything)