dlyinf.exe is a Backdoor Troj/TheMouse-A. dlyinf.exe tries to terminate antiviral programs installed on a user computer. Related files: %System%/dlyinf.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill dlyinf.exe process and remove dlyinf.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.