Written by An user may receive an error “The User Profile Service service failed the logon. User profile cannot be loaded.” when logging on to a Windows machine.
This problem can be solved in two ways.
Solution 1:
Follow the steps in this article: http://support.microsoft.com/kb/947215
This solution includes renaming of the registry keys which contain the profile information. If this solution does not work, try the following solution.
Solution 2:
The security rights on the ‘Default’ user folder must be corrected. Follow these steps: