The start update window in update.exe in Avira AntiVir PersonalEdition Classic 7.0 build 151 allows local users to gain system privileges via a "Shatter" style attack on the (1) IParam parameter, and the (2) PBM_GETRANGE and (3) PBM_SETRANGE messages in an unspecified progress bar.  NOTE: some details are obtained from third party information.