With the retaining screw removed, the only step left to completely remove the expansion card from the computer is to pull the card from the expansion slot on the motherboard.
With both hands, firmly grip the top of the expansion card, being careful not to touch any of the sensitive electronic parts on the card itself. Also, make sure that all wires and cables are clear of where you are working. You don't want to damage something while trying to troubleshoot a problem you're already having.
Pull up a little, one side of the card at a time, slowly working the card out of the slot. Most expansion cards will fit firmly in the motherboard slot so don't attempt to yank the card out in one, brute pull. You'll likely damage the card and possibly the motherboard if you're not careful.
