I recently got an error when adding a new SharePoint 2007 (SP2) server to our existing MOSS farm.  I had run the installation fine, and was walking through the SharePoint Configuration Wizard, when I got an error on step 2: “Resource retrieved id PostSetupConfigurationFailedEventLog is Configuration of SharePoint Products and Technologies failed.”

I searched the net, but didn’t really find anything.

I then remembered that I had forgotten to run the latest SharePoint updates (for us, the latest applied was December 2009).  I installed the WSS update, and then the MOSS update and both worked fine.  I then ran the Configuration wizard again and it worked without any errors.