MSGUPDAT32.EXE is a Trojan W32.Rbot-BBB. MSGUPDAT32.EXE opens a back door on IRC channels. MSGUPDAT32.EXE spreads via open network shares. Related files: %System%\MSGUPDAT32.EXE More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill MSGUPDAT32.EXE process and remove MSGUPDAT32.EXE from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.