OOsorio,
I have seen a similar issue that was linked to Norton's uninstall deleting a registry entry that is needed by BITS. Look in the registry key below ...
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l
\BackupRestore
Do you have a key (i.e. folder) named FilesNotToBackup? If not try creating it and then see if that fixes the problem.
Remember to always have a backup before editing the registry. The change you are making should not cause a problem but accidents can happen. Let me know if you have any questions or need more information.