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If you are getting the error “User Profile Service Failed to Logon:, then we would have a few options to try. Please follow these steps to resolve the issue:

A) Fix the Registry:
Note: Please follow these steps carefully. Serious problems might occur if you modify the registry incorrectly.
• Click Start
• Click on Run
• Type regedit and click on OK
• This will open the Registry Editor for you
• Navigate to the following Registry key
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\Current Version\Profile List
• In the left pane, look for the folder name starting with S-1-5 (SID key) followed by a long number. then click each folder and locate Profile Image Path from the right pane, double click to verify that this is the user account profile that has the error.
• If you have two folders starting with S-1-5 followed by same long numbers and one of them ended with .bak. Change the .bak folder to normal one. To do this, follow the steps below:
• Right click the folder without .bak and choose Rename. Then add .old at the end of the folder name.
• Right click the folder with .bak and choose Rename. Then remove .bak at the end of the folder name.
• If you have only one folder starting with S-1-5 followed by a long numbers and ended with .bak. Right click the folder and choose Rename. Then remove .bak at the end of the folder name.
• Choose the folder without .bak, in the right pane, double click Ref Count and type 0 and then click OK.
• Choose the folder without .bak, in the right pane, double click State and type 0 and then click OK.
• Close Registry Editor.
• Restart the computer.
• Log on again with your account.

B) Run the Microsoft Troubleshooter.
Go to the following link and run the troubleshooter to fix the issue.
http://support.microsoft.com/kb/947215

Here’s to Good Karma