Speeding Up My Computer

by Anas
(Sri Lanka)

Speeding up my computer is my goal. How do I do it?
I have a Dell OptiPlex GX400. I want to speed up my computer. When I connect to the Internet it loads very slowly and it is very difficult to watch videos. I am going to buy more RAM and a hard disk. Do you have more computer tips and guides to
speed up my computer?