Cannot log into admin

I just upgraded from 3.14 to 3.2. It all seemed to work great yesterday. Then, this morning I received the following error, after I put in my username and password.
Fatal error: Call to undefined function is_network_admin() in /hermes/web01/xxxxx/moo.mrherrera/reflections/wp-admin/includes/menu.php on line 10
Should I, download the zip file of 3.2, unzip it and upload the wpadmin and the wpincludes files to fix this issue?