Try each of the following steps in order until the issue is resolved:

  1. Reboot the workstation
  2. Set the appropriate permissions on the workstation
  3. Add a new user name with the same security rights as the problem user . If this corrects the issue, review What to consider before deleting a user name and delete the problem user name
  4. Uninstall/reinstall the workstation
  5. Refer to BB73516