The standard 404 error indicates that the page you requested doesn't exist. This can mean that you've either named the default page incorrectly or neglected to configure the default document for the site. In either case it's a quick fix to get the site up and running properly.
If you receive a 404 error on a site you've recently set up, and the site has never worked properly, the problem is most likely with the name of the home page document or the default document settings. Here's how to rectify the situation: