
Select Microsoft Defender Antivirus in the list and click the Turn on button. A list of installed antivirus or antispyware programs is displayed.Click the View installed antivirus apps or View installed antispyware apps option.In the Security and Maintenance window, click the Security option to expand that section. Microsoft Defender was once regarded as a poor means of protecting your PC from malware.

If a link is not available in the pop-up message, you need to open the Control Panel and access the Security and Maintenance option.

Microsoft Defender Antivirus is now enabled. If available, click the click here to turn it on link in that pop-up message. It was first released as a downloadable free.

Microsoft Defender Antivirus is enabled by default, so there is no need to manually enable it unless it was previously disabled. How do I enable or disable Microsoft Defender Antivirus? If you have another antivirus program installed on your computer, like AVG, McAfee, or Webroot, Microsoft Defender Antivirus is disabled to prevent conflicts with the antivirus program.
