When you rename a user account in on a computer that is running Windows Vista, Windows Server 2008, Windows 7 or Windows Server 2008 R2, the user profile path is not changed automatically. It may cause some confusion when the %SystemDrive%\users folder is viewed
Microsoft has confirmed this to be by design in Windows.
To workaround this issue, you can use the steps below to manually rename the profile path.
1. Log in by using another administrative account.
Note You may need create a new administrative account at first.
2. Go to the C:\users\ folder and rename the sub folder with the original user name to the new user name. 3. Go to registry and modify the registry value ProfileImagePath to the new path name.
WARNING If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
4. Log out and log in again by using the user whose name is changed, and the user should use the pervious profile with new path name.