Wordpress- PHP Warning Error: include_path='.;C:\php5\pear'

After attempting to install child theme. Whenever i type in my website url it is now a blank page with this following:

PHP Warning: Dottoro_Theme::require_once(E:\web\*******\htdocs/wp-admin/includes/file.php) [dottoro-theme.require-once]: failed to open stream: No such file or directory in E:\web\*******\htdocs\wp-content\themes\dottoro_studio\lib\common\theme.php on line 1525 PHP Fatal error: Dottoro_Theme::require_once() [function.require]: Failed opening required 'E:\web\*******\htdocs/wp-admin/includes/file.php' (include_path='.;C:\php5\pear') in E:\web\*******\htdocs\wp-content\themes\dottoro_studio\lib\common\theme.php on line 1525


any help would be greatly appreciated! thank you.