Migrating the sharepoint site classic mode authentication to Claims based Authentication

Reference using the below links migrated site successfully.

 

http://technet.microsoft.com/en-us/library/gg251985.aspx

http://weblogs.asp.net/sreejukg/archive/2011/03/25/change-sharepoint-authentication-from-classic-mode-to-claims-based.aspx

http://blog.henryong.com/2011/08/18/sharepoint-2010-converting-from-classic-to-claims-authentication-lessons-learned/#comment-6558

Error Message
Set-SPWebApplication: An update conflict has occurred, and you must re-try this action. The object SPWebApplication Name=SharePoint Sites was updated by domain\serviceAccount, in the OWSTIMER process, on machine SPServer. View the tracing log for more information about the conflict.
As per henry blog, I feel best to follow the steps 3 & 4 to avoid the above error message...

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(After Migration we did not use Point No.7)