If you have POP-UP DOMINATOR as a plugin on your blog – Deactivate and DELETE completely off your blog. This is the culprit that caused the biggest problem to entering the wp-admin. Sometimes deactivating is not enough, therefore you must delete the file completely.
Once the above is done… try to enter wp-admin – you should be good to go!
If you updated and still have the problem above, then those files may still be resident in your wordpress platform. If this is you; then you must open your cPanel or FTP client and locate this file, “general-template.php” at …
/home/yourusername/public_html/wp-includes/general-template.php and locate these 2 strings below.
> if ( is_rtl() )
> echo apply_filters( ‘wp_admin_css’, “<link rel=’stylesheet’ href='” . esc_url( wp_admin_css_uri( “$file-rtl” ) ) . “‘ type=’text/css’ />\n”, “$file-rtl” );
change the above to…
< #if ( is_rtl() )
< #echo apply_filters( ‘wp_admin_css’, “<link rel=’stylesheet’ href='” . esc_url( wp_admin_css_uri( “$file-rtl” ) ) . “‘ type=’text/css’ />\n”, “$file-rtl” );
notice the < #
the above will comment out the string command so you may enter your admin.
Another issue was between the Visual & Html editor on your TINYMCE. If you cannot see the Visual editor, it means that you must deactivate all your plugins and activate them back on 1 at a time until you find the next problematic plugin.
Good luck!