PSConfig Fails with Missing / Required Error Message After Applying CU or Service Pack in SharePoint 2010

The following blog post saved our farm.  Well, maybe not quite that dramatic, but it certainly saved me a lot of time.  Essentially, the only thing I had to do was run the suggested PowerShell, and everything worked perfectly afterwards.

“Try running the command Get-SPProduct –local on the server that says it’s missing the required patch.”