Nickelbee

Hi everyone:) Yesterday I suddenly started getting ads on Facebook and every other site I would go on. They all say "Ads not by this site". Some are video ads, some are not. I have run Malware Bytes, Super Anti Spyware, Crap Cleaner, Sophos Virus Scan, Microsoft Security Essentials...none of them are finding it I've cleared cookies and cache also. Can anyone help? Thanks so much in advance:)