Press F5, click or tap the refresh or reload button, or try the URL again in the address box to attempt the web page again.
Even though there is no true problem, the 404 Not Found error may appear for a variety of reasons, so occasionally a simple refresh will usually load the page you were looking for.
Check the URL for mistakes. This error frequently occurs as a result of incorrect URL typing or links being clicked that lead to invalid URLs.
Upgrading the URL one directory level at a time may save you find what you’re looking for.
Use one of the many search engines to look up the page. You might simply have the incorrect URL, in which case a fast Google or Bing search should lead you to your desired location.
Update your bookmark or favourite if you eventually find the page you were looking for to prevent future occurrences of the HTTP 404 error.
Upgrading the URL one directory level at a time will help you find what you’re looking for.
If www.web.com/a/b/c.htm returned a 404 Not Found error, go to www.web.com/a/b/. If you receive nothing (or an error) from this page, go to www.web.com/a/.
This should point you in the right direction or at the very least confirm that you can no longer find what you’re looking for.