Norton360v5 backup error message Failed: Encrypted files Encountered

I get this error and have no known encrypted files - what are my options?

This is additional info

I run windows 7 and have the latest v5 version ... .29

I backup to a usb drive and only backup my desktop files (9GB)

thanks

Found my encrypted files via the following ....

 

 

How to list encrypted files in Windows 7?
FROMfi
http://superuser.com/questions/58878/how-to-list-encrypted-files-in-windows-7



(1)
You can type: encryptionstatus:encrypted Into the search field in an explorer window.
(2)
Here is what I found as a workable solution:

open a cmd prompt
Enter the command: cipher /s:c:\ > encryption.txt
Open the file "encryption.txt"
To find encrypted folders, search for "will be encrypted"
To find encrypted files, search for "E" at the beginning of a line
Without parameters, Cipher lists state of the current directory and all files in it. The /s parameter tells it to recurse, and c:\ gives it the starting point. From there, "> ..." just redirects the output.

Cipher's output for encrypted files and folders look like this:

 Listing c:\Dev\Encrypted\
 New files added to this directory will be encrypted.

E Default.aspx
E Default.aspx.cs
E Default.aspx.designer.cs

Cipher's output for normal files and folders look like this:

 Listing c:\Dev\Plaintext\
 New files added to this directory will not be encrypted.

U Default.aspx
U Default.aspx.cs
U Default.aspx.designer.cs