Page Not Found
Web Page not available.
The web page you were trying to visit might be temporarily down or it may have moved or replaced.
Please go back and try any other link.
Simple explanation and why happens
All it takes is a broken link.
The 404 Not Found error might appear in a valid link for several reasons...a server glitch for example, so simply "go back and try again" can result and load the page you were looking for.
But usually there is a mistake somewhere provoking the event.
If you were typing the URL try to copy/paste from the source to avoid typos.
If you clicked a link maybe was webmaster's fault...he could have typed the address wrong. ...or maybe the site is under construction and the page is not live yet.
You can try to right click the link, using "copy link address", and pasting on the address bar. Before pressing enter or click "go", analyse what might be wrong...many times we can clearly see the error.
You can always clear your computer DNS cache and or clean up the browser cookies and try again.
Many webmasters change their pages and forget to update the links or keep old one redirected. it's a common problem as it gets harder to control every page recycled after frequent changes.
Are you the site's owner?
If you are the webmaster check the error log on your control panel. You will find more errors and eventually you will fix them all.
Never change a page name without taking measures to prevent this from happening redirecting every old pages you might have.
Not the site's owner?
If you were surfing someone's site you can always try to contact the web master.