Here is a simple guide on how to remove or replace a traditional Windows laptop's hard drive. Please note this guide will not work for all laptop models (most of them will work however) and it will NOT work for any unibody Macbook or Macbook Pro models. Leave any questions you may have in the comments below!
Step #1: Grab the laptop & a Phillips head screwdriver
Step #2: Locate the two (in some models only one) screws with the cylinder symbol next to them
Step #3: Unscrew both screws carefully as you do not want to strip them
Step #4: Once these screws are removed, gently slide the hard drive out of the chassis
Step #5: You now have removed your laptop's hard drive successfully