Final Idea for an Interactive Web Site

Here's another idea for an interactive web site, I don't know if this is around, but it would be nice to have an application to guide a person through upgrading their computer. I want to make my computer be able to hold more and the people I talked to kept saying that I needed to install this and that and put in a new thingy in the console and wouldn't tell me how to do all this myself. I know I can do all this, I just need a basic step by step instruction manual or web site to help me do this. I don't want to pay someone to do something that I am more than capable of doing myself.