There are a number of errors you might encounter when trying to load a web page. The first problem might be "The specified server could not be found." This means that you either have a bad URL or the server is off line or no longer exists. This could be the result of an outdated link, a server that has been discontinued or a mistake in typing or pasting the URL into the address box.
If you get a "file not found" error, check to make sure you didn't type or paste the URL incorrectly. A valid URL may start with "http://" or "www" or just the domain name (i.e., "about-the-web.com"). The URL will usually end with either ".htm" or ".html" but may contain other characters as well. Another common ending is the slash ("/") character. The URL will not contain quotation marks, commas or any of these ( < > ). The other possibility is that the page you requested no longer exists.
Other errors usually have to do with not having authorization to view the page. If it is a page you think you ought to have access to, check with the system administrator for that server and find out what you need to know.