Ensure Microsoft Windows Defender Antivirus is enabled in the Windows Security app and you may follow these steps:

· First, open the Windows security app by choosing the shield option in the taskbar or finding the start menu for Windows Defender, · Choose the virus and threat protection tile · Pick virus and threat protection settings · Click the Real-time protection switch to on

To know more details about how to enable Windows Defender.

Visit Here: How to Turn Off Windows Defender Windows 10?