Take note of which way the positive lead marker on the capacitor is facing before removing it. You will need to know for the next step.

Desoldering can damage motherboards, so first practice on a board you don't need. Use a 40-50W soldering iron with a chisel tip and 0.080" wide desoldering braid. Also helpful are rosin flux and 60/40 tin/lead solder, in case all the solder doesn't come out. Wiggle desoldered leads to verify they're free, and never pull on any that aren't.