A false detection or false positive occurs when your antivirus software sends a virus alert message or makes a log file entry that identifies a virus where none actually exists.
You can see false detections if you have antivirus software from more than on vendor installed on your computer. Because some anti-virus software stores the code signatures it uses for detection unprotected in memory. The safest course to take when you see an alert message or log entry is to treat it as a genuine virus threat and to take the appropriate steps to remove the virus from your computer system. But if you believe that the antivirus software has generated a false detection ( ie. it flags a file as "infected" when you have used it safely for years ) , check for one of more of the following situations before you contact your antivirus software company.