3 Ways to Download & Install Windows Security on Windows 11

by Madhuparna Roy

Madhuparna Roy

A diploma holder in computers and with a keen interest in technology, Madhuparna is passionate about writing How-to guides and helping people solve the most intricate Windows issues…. read more

  • Windows Security sometimes triggers unexpected errors, blocks some apps or it may break down due to a bug. 
  • Restarting your PC could help fix the issue sometimes, but if it doesn’t, you would need to use more troubleshooting techniques. 
  • Although the app is enabled by default in Windows 11, you may need to reinstall Windows Security to fix the problem. 

Windows security app not working on Windows 11


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With Windows 11, you do not need to download & install Windows Security separately, since it comes built-in with the OS.

Windows Security is the suite that comes built-in with Windows. So, when you install Windows 11, it gets automatically installed. It proves to be one of the most effective security solutions by Microsoft.

It includes an antivirus program called Microsoft Defender Antivirus which was known as Windows Defender Security Center in the older versions of Windows 10.

The app does a considerably good job in most situations with real-time protection for your PC from virus and malware attacks.

However, the app is prone to issues, for example, it may fail to open or may not work sometimes when you try to launch the app.

You may want to check first if the Windows Defender app is turned off