mdms.exe is a Trojan.Cimuz-C. mdms.exe opens a back door. mdms.exe tries to terminate antiviral programs installed on a user computer. Related files: %System%\mdms.exe %System%\winacpi.dll More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill mdms.exe process and remove mdms.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.