AUNPS2.dll is an adware program Adware.AUNPS. AUNPS2.dll displays advertisements. Related files: %System%\AUNPS2.dll Adds the value: "AUNPS2" = "RUNDLL32 AUNPS2.DLL,_Run@16" to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Remove AUNPS2.dll from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.