NaviHelper.dll is an adware program Adware.Navihelper. NaviHelper.dll is a Browser Helper Object. NaviHelper.dll downloads and displays advertisements. Related files: %System%\NaviHelper.dll More info: http://securityresponse.symantec.com/avc... Removal: Remove NaviHelper.dll from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.
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