This is Ted. Three QFE was announced from MS in 11, September. refer the following detail. Buffer Overrun In RPCSS Service Could Allow Code Execution This update addresses the Buffer Overrun In RPCSS Service Could Allow Code Execution (824146) for Windows XP Embedded with SP1. This patch is NOT for XP Embedded Run-time images, but patch the component in Database of Development machine. We have uploaded the patch for Run-time image. - DST.SE Ted