diff --git a/windows/security/threat-protection/windows-defender-antivirus/detect-block-potentially-unwanted-apps-windows-defender-antivirus.md b/windows/security/threat-protection/windows-defender-antivirus/detect-block-potentially-unwanted-apps-windows-defender-antivirus.md index d1a9bb41d7..059d6681dd 100644 --- a/windows/security/threat-protection/windows-defender-antivirus/detect-block-potentially-unwanted-apps-windows-defender-antivirus.md +++ b/windows/security/threat-protection/windows-defender-antivirus/detect-block-potentially-unwanted-apps-windows-defender-antivirus.md @@ -26,11 +26,13 @@ manager: dansimp Potentially unwanted applications are not considered viruses, malware, or other types of threats, but they might perform actions on endpoints which adversely affect endpoint performance or use. _PUA_ can also refer to an application that has a poor reputation, as assessed by Microsoft Defender ATP, due to certain kinds of undesirable behavior. -These kinds of undesirable PUA behavior include: +For example: -- Ad injection into web browsers -- Various types of software bundling -- Driver and registry optimizers that detect issues, request payment to fix the errors, and then make no changes or optimizations (also known as "rogue antivirus" programs) +* **Advertising software:** Software that displays advertisements or promotions, including software that inserts advertisements to webpages. +* **Bundling software:** Software that offers to install other software that is not digitally signed by the same entity. Also, software that offers to install other software that qualify as PUA. +* **Evasion software:** Software that actively tries to evade detection by security products, including software that behaves differently in the presence of security products. + +For more examples and a discussion of the criteria we use to label applications for special attention from security features, see [How Microsoft identifies malware and potentially unwanted applications](../intelligence/criteria.md). Potentially unwanted applications can increase the risk of your network being infected with actual malware, make malware infections harder to identify, or waste IT resources in cleaning them up.