Win7 Backup error!?

"Backup encountered a problem while backing up file C:\Windows\System32\config\systemprofile\AppData\Local\Microsoft\Windows\Themes. Error:(The system cannot find the file specified. (0x80070002))"

Searching discussion in Internet, some refer to review HKEY_LOCAL_MACHINE\...
But I think a suggested workaround is quite simple and more effective: create subfolder "Themes" that it want to find.

References:

• http://social.answers.microsoft.com/Forums/en-US/w7performance/thread/dd6cbf98-2fb3-4ca8-9ba3-c6a7e33a1d5d
• http://social.technet.microsoft.com/Forums/en-US/w7itprogeneral/thread/bff71aac-c78e-42bd-a959-116019c93478