Warning: require(C:\xampp\htdocs\wp-content/wp-blog-header.php) [function.require]: failed to open stream: No such file or directory in C:\xampp\htdocs\wp-content\index.php on line 19

Fatal error: require() [function.require]: Failed opening required 'C:\xampp\htdocs\wp-content/wp-blog-header.php' (include_path='.;C:\xampp\php\pear\') in C:\xampp\htdocs\wp-content\index.php on line 19