Lets get started

Building up a computer is impossible for me, I don't even know how to fix a toy car. If you are thinking this way right now, don't worry, let's start with some easy stuffs. We can started with how to change ram and hardrive for your laptop. All you need is a + screwdriver and your hands.
First you need to shut off the power and take out the battery if you can. Here is a special tip before you do that. In winter time, especially you are wearing a sweater, the static electricity on your hand can possibly have huge damage to the old main boards. So before you take things apart, touch something that is metal so the electricity on your hand can flow away. Then we can start unscrew the screws on the back of the laptop. Different brand have different design on the back. This is basically what you are going to see.

rams are usually by the middle, in this case is right above the battery. The two hard drives are next to it.

You can take out the ram by pressing at the metal part on the side of it, and it will pop out. For the hard drive, you need to unscrew the screws again.

Why are we wasting our time doing this you may ask. Do you know that by knowing how to do this can save you at least 100 bucks. Also if sometimes your computers shows blue screen, taking off the ram and plug it back in can help.