Ransomware – Windows Blog by Brink


Enable or Disable Controlled Folder Access for Microsoft Defender Antivirus in Windows 11

Microsoft Defender Antivirus is an antivirus software that is included in Windows 11 and can help protect your device from viruses, malware, and other threats.

Controlled folder access helps protect your valuable data from malicious apps and threats, such as ransomware. In a ransomware attack, your files can get encrypted and held hostage.

Controlled folder access protects your data by checking apps against a list of known, trusted apps. With controlled folder access in place, a notification appears on the computer where an app attempted to make changes to a file in a protected folder.

Controlled folder access works by only allowing trusted apps to access protected folders. Protected folders are specified when controlled folder access is configured. Typically, commonly used folders, such as those used for documents, pictures, downloads, and so on, are included in the list of controlled folders.

Controlled folder access works with a list of trusted apps. Apps that are included in the list of trusted software work as expected. Apps that are not included in the list are prevented from making any changes to files inside protected folders.

Apps are added to the list based upon their prevalence and reputation. Apps that are highly prevalent and that have never displayed any behavior deemed malicious are considered trustworthy. Those apps are added to the list automatically. You can also manually allow apps to give them access to the protected folders.

This tutorial will show you how to enable or disable Controlled Folder Access for Microsoft Defender Antivirus in Windows 11.

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