Post Setup(PSConfig)Configuration of SharePoint Products and Technologies failed

While Running PSconfig, Its failed in Any step.

Please follow the below Steps to fix the issue.

 Fix 1:

Copy the web.config file from: C:\ProgramFiles\CommonFiles\MicrosoftShared\WebServer         Extensions\12\CONFIG To: C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\TEMPLATE\LAYOUTS.

  Then run: psconfig -cmd upgrade -inplace b2b –wait  –force 

Upon re-running the configuration wizard via command line, my upgraded succeeded and returned. Run the PSConfig Wizard and check for Success of it.

Note: Delete web.config from C:\ProgramFiles\CommonFiles\MicrosoftShared\WebServer Extensions\12\TEMPLATE\LAYOUTS.

    Fix2 :

Rename the DSN in the registry to DSN.old

Path :HKLM > Software > Microsoft > Shared Tools > Web Server extensions > 12 > Secure > ConfigDB > DSN

Note: The path For SharePoint 2010 is below

Path :HKLM > Software > Microsoft > Shared Tools > Web Server extensions > 14.0 > Secure > ConfigDB > DSN
        
       

Once the DSN is renamed, Run the PSCONFIG Wizard again.

Note: Please consider the customizations while running this step in Production.