Auto Update Crashed My Site

Hello
A recent auto update was applied to my site (www.nhint.com) and it seems to have crashed my site.

I get the following error messages:

Warning: require(/home/nhintcom/public_html/wp-includes/version.php) [function.require]: failed to open stream: No such file or directory in /home/nhintcom/public_html/wp-settings.php on line 30

Fatal error: require() [function.require]: Failed opening required ‘/home/nhintcom/public_html/wp-includes/version.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/nhintcom/public_html/wp-settings.php on line 30

PLease advise or resolve!
Nick