A while ago, Microsoft introduced the new protection option against Potentially Unwanted Applications (PUA) in Microsoft Edge. Today the company revealed how it works.
The option was first introduced in Edge Canary 79.0.280.0. Check out the following article:
Potential Unwanted Application (PUA) usually refers to unwanted application bundlers or their bundled applications. These applications can increase the risk of your device being infected with malware, and can waste your time cleaning up the applications. Typical examples of behavior that is considered unwanted include ad-injection, many types of software bundling, and persistent solicitation for payment for services based on fraudulent claims.
Windows Defender comes with built-in protection against such apps.
How Microsoft Determines PUA
Microsoft uses specific categories and the category definitions to classify software as a PUA.
- Advertising software: Software that displays advertisements or promotions, or prompts you to complete surveys for other products or services in software other than itself. This includes software that inserts advertisements to webpages.
- Torrent software: Software that is used to create or download torrents or other files specifically used with peer-to-peer file-sharing technologies.
- Cryptomining software: Software that uses your device resources to mine cryptocurrencies.
- 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 qualifies as PUA based on the criteria outlined in this document.
- Marketing software: Software that monitors and transmits the activities of users to applications or services other than itself for marketing research.
- Evasion software: Software that actively tries to evade detection by security products, including software that behaves differently in the presence of security products.
- Poor industry reputation: Software that trusted security providers detect with their security products. The security industry is dedicated to protecting customers and improving their experiences. Microsoft and other organizations in the security industry continuously exchange knowledge about files we have analyzed to provide users with the best possible protection.
PUA Protection in Microsoft Edge
If an app has been mislabeled as PUA, users can choose to keep it by tapping … in the bottom bar, choosing Keep, and then choosing Keep anyway in the dialog that appears.
Using the Downloads page, the user can also choose Report this app as reputable from the download context menu, which will open Microsoft's feedback site. There, the user can report that the file is mistakenly marked as PUA.
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