msdupd.exe is worm W32.Rbot-BCE. msdupd.exe opens a back door. msdupd.exe spreads via open network shares. msdupd.exe tries to terminate antiviral programs installed on a user computer. msdupd.exe monitors user Internet activity and private information. It sends stolen data to a hacker site. Related files: %System%\msdupd.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill msdupd.exe process and remove msdupd.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.