Windows Defender is Microsoft’s anti-malware component for Window. Initially released with Windows Vista and Window 7, Windows Defender is now an integral security component of Microsoft’s latest OS . It offers a suite of anti-malware tools that are enabled by default when Windows 10 is installed and booted up. However, people with existing third-party antivirus and cyber security packages might want to use them instead of the Windows Defender. Having Windows Defender enabled at the same time as other security software could cause problems with third-party antivirus tools, so in this case, you might opt to turn Windows Defender off and is windows defender not running. But if your subscription to a third-party antivirus runs out, or the version becomes severely outdated, you might want to switch Windows Defender back on. We'll go into more detail about how to turn the free security software on and off further down the page, but if you're wondering when to use Windows Defender, here's your answer.

• Is windows defender not running Windows Defender is Microsoft’s anti-malware component for Window. Initially released with Windows Vista and Window 7, Windows Defender is now an integral security component of Microsoft’s latest OS . It offers a suite of anti-malware tools that are enabled by default when Windows 10 is installed and booted up. However, people with existing third-party antivirus and cyber security packages might want to use them instead of the Windows Defender. Having Windows Defender enabled at the same time as other security software could cause problems with third-party antivirus tools, so in this case, you might opt to turn Windows Defender off and is windows defender not running. But if your subscription to a third-party antivirus runs out, or the version becomes severely outdated, you might want to switch Windows Defender back on. We'll go into more detail about how to turn the free security software on and off further down the page, but if you're wondering when to use Windows Defender, here's your answer.