dkernel.exe is a worm W32.Decoy-A. dkernel.exe opens a back door. Related files: %System%\I75-D2\dkernel.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill dkernel.exe process and remove dkernel.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.