Pattonat.dll is a Backdoor Trojan.Riler.C. Pattonat.dll spreads via open network shares. Related files: %System%\layerpop.ini %System%\Pattonat.dll More info: http://securityresponse.symantec.com/avc... Removal: Remove Pattonat.dll from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.