I clicked the "update automatically" button and received this message:
Downloading update from http://wordpress.org/wordpress-3.5.1.zip…
Unpacking the update…
Warning: copy(C:/Clients/Grass Roots Media/www.grassrootsmedia.net/wp-admin/includes/update-core.php): failed to open stream: Permission denied in C:\Clients\Grass Roots Media\www.grassrootsmedia.net\wp-admin\includes\class-wp-filesystem-direct.php on line 200
Could not copy files.
How do I fix this?