If an upgrade attempt failed, and the underlying issue has been resolved, it may be the case that the upgrade needs tobe forced to be completed. One way of achieving this is by running the command-line version of the SharePoint Products and Technologies Configuration Wizard.
To force an upgrade
1. Open a Command Prompt window.
2. Change to the following directory: <system drive>\Program Files\Common Files\Microsoft Shared\web server extensions\14\BIN.
3. Type the following at the command prompt:
psconfig –cmd upgrade –inplace b2b –wait –force
-WAIT = No timer job so the upgrade happens in real time in the psconfig process.
-FORCE = Removes all existing upgrade jobs incase a timer job is stuck.
Anm: Found in social.technet. ms.com