WSUS 3.0 SP2 will not run after installing update KB2720211

We are running our Updates server on vcentre, suddenly we were not able to open the windows server update services, MMC was failing to open. After a long research i found the method to install KB2720211 update file. following method i used.

• Download the KB2720211 installer for your architecture from Microsoft (http://support.microsoft.com/kb/2720211) 

• Extract WUSSetup.msp from the installer by running the installer with the /extract parameter (example: "WSUS-KB2720211-x64.exe /extract") 

• With 7-zip, open WUSSetup.msp and extract "PCW_CAB_SUS". 

• With 7-zip, open "PCW_CAB_SUS" and extract "DbCert", "DbCertDll", and "DbCertSql".

• Rename those files to "WSUSSignDb.cer", "WSUSSignDb.dll", and "WSUSSignDb.sql", respectively. 

• On your WSUS server, navigate to C:\Windows\SYSMSI\SSEE\MSSQL.2005\MSSQL\SchemaSig" and copy the extracted "WSUSSignDb.cer" and "WSUSSignDb.dll" to it.

• Make a backup copy of the two existing versions, just in case. 

• On your WSUS server, navigate to "C:\Program Files\Update Services\Database" and copy the extracted "WSUSSignDb.sql" to it. 

•  Make a backup copy of any existing versions of the file. 

 It worked well and i was able to install the update file. Thanks saththiyan