Unable to log into dashboard after install

I have installed a new version of wordpress 3.4.2 using the 5 minute setup. When going to http://cogdellumc.org/wp-admin/ I am presented with:

Warning: require_once(/home/terrykwm/public_html/admin.php) [function.require-once]: failed to open stream: No such file or directory in /home/terrykwm/public_html/wp-admin/admin.php on line 12

Fatal error: require_once() [function.require]: Failed opening required '/home/terrykwm/public_html/admin.php' (include_path='.:/usr/lib/php:/usr/local/lib/php:/home/watchco/public_html/dynamic') in /home/terrykwm/public_html/wp-admin/admin.php on line 12

I’ve looked in this file the line in question is:
require_once( dirname(dirname(__FILE__)) . '/admin.php');

I have searched the forums and found only solutions to problems that were about a year old and while similar did not appear to be identical.
I have tried reuploading the wp-includes folder as mentioned in onf of the fixes but to no avail.
I have tried a completely fresh install with the same results.
There is no space infront of <?php in this file, as mentioned in other threads.

Can someone help please?