Warning: require(C:\xampp\htdocs\site/wp-includes/category.php) [function.require]: failed to open stream: No such file or directory in C:\xampp\htdocs\site\wp-settings.php on line 175

Fatal error: require() [function.require]: Failed opening required 'C:\xampp\htdocs\site/wp-includes/category.php' (include_path='.;C:\xampp\php\PEAR') in C:\xampp\htdocs\site\wp-settings.php on line 175