WordPress admin section appears broken

by

In your screenshot I can see at least 3 menu items that were added by a plugin.

Standard practice when WP breaks after an update is to:

  1. Disable all plugins (You can rename the /wp-content/plugins directory to turn them all off at once).
  2. Revert to the default (TwentyEleven) theme

Then you can re-enable your plugins one at a time to figure out which one it is that’s breaking things.