My LCD (15" Samsung) has dots pigmentations all over the screen evertime I close a window.. but when I would refresh the screen the dots would disappear and would reappear gain if a open or close a window.
What does this indicate a defective LCD or video card?
More abouthelp defective video card
Vid card or vid drivers. I'd update the drivers (or if you recently updated, rollback) and see what you get.
most definitely drivers I had the same problem, just updated the drivers on this old integrated gpu :P and it's all fine now