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Begin by thoroughly removing all existing carpet from the stairs and landings. Use pliers, a pry bar, and a utility knife to lift and cut the carpet and padding. Once the carpet is removed, use a staple remover to extract all remaining staples from the stair treads and risers. Next, carefully remove the old wooden stair treads. This can typically be done by prying them up with a pry bar, being mindful not to damage the underlying stringers or framing. Remove any nails or fasteners left behind.