I was troubleshooting a SharePoint environment the other day and was stuck in PSConfig
Performing configuration task 3 of 4 Upgrading SharePoint Products... 10.00% :
This was initialized by running the command
PSConfig.exe -cmd upgrade -inplace b2b -force
I waited and waited, left the box on over the night but still stuck and there wasn't really any information on the net that helped me either. To resolve this I had to
Ensure I was logged on as farm administrator
Adjust my command a bit
Added the -wait parameter
PSConfig.exe -cmd upgrade -inplace b2b -wait -force
Monitor the upgrade process in the terminal
After the second step you should ensure the SharePoint Timer Service is started
C:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\BIN>PSConfig.exe -cmd upgrade -inplace b2b -wait -force SharePoint Products Configuration Wizard version 15.0.4569.1503. Copyright (C) Microsoft Corporation 2012. All rights reserved. Performing configuration task 1 of 4 Initializing SharePoint Products upgrade... Waiting to get a lock to upgrade the farm. Successfully initialized the SharePoint Products configuration. Performing configuration task 2 of 4 Initiating the upgrade sequence... Successfully initiated the upgrade sequence.
Start the timer service when you reach this step
This resolved my issue and the commad finished successfully
Performing configuration task 3 of 4 Upgrading SharePoint Products... 100.00% : Successfully upgraded SharePoint Products. Performing configuration task 4 of 4 Finalizing the SharePoint Products configuration... Successfully completed the SharePoint Products configuration. Total number of configuration settings run: 4 Total number of successful configuration settings: 4 Total number of unsuccessful configuration settings: 0 Successfully stopped the configuration of SharePoint Products. Configuration of the SharePoint Products has succeeded.