If you agree, select Add extension to install Microsoft Defender Browser Protection on Chrome. Once you've installed the extension, the Microsoft Defender icon will appear in the Chrome toolbar.

If Windows Security is unable to block an app in Windows 11, follow the solutions mentioned in this post to block the app or find out if it's actually malicious.

If you want to set up Windows Defender Advanced Threat Protection (ATP) on Windows Server, follow the steps mentioned in this post.