How do I correct or get rid of error #2060: Security sandbox violation?

SecurityError: Error #2060: Security sandbox violation: ExternalInterface caller https://static.adsafeprotected.com/detector3.pix cannot access <unknown>.

at flash.external::ExternalInterface$/_initJS()

at flash.external::ExternalInterface$/addCallback()

at detector3_fla::MainTimeline/registerExternalCallbacks()

This error just started in the past few days, and I have not downloaded any new programs or apps.  I have restored my computer to a previous restore point, but still experience the error.  Any help PLEASE??