Checking this box includes a pattern-matching process to scan for files that are similar to known viruses. This is how new and previously unknown viruses are detected. Because of this, StopSign often detects files that "May Be Infected", while other antivirus engines do not. Using this feature may increase the chance that a harmless file may be viewed as infected. It will not delete the file, it will quarantine it so you can decide if this is a false positive or not. Contact Technical Support at This e-mail address is being protected from spam bots, you need JavaScript enabled to view it for help in deciding how to treat a possible false positive or quarantined file.