I am really struggling and would appreciate any advice you can give me. I have a number of wordpress sites. My two main sites when I try to go to the wp-admin to sign in all I get is a web page cannot be found HTTP 404 error. I have cleared my cookies and browser caching. I have tried moving the plugins and re uploading the wp-login.php file but still no joy. One of my other wordpress sites works fine so it should not be browser related. Any ideas please.