Lack of an antivirus program, or an expired one

Windows Defender is the default anti-malware program Main reasons Windows Defender keeps turning on.Check how to enable or disable Windows Defender below. If you don’t see the icon, it means you don’t enable Windows Defender on your computer. If you see a Windows Defender icon in the system tray, you can double-click it to open Windows Defender in Windows 10/11. Open Windows Defender in Windows 10/11 from the system tray Click System and Security and click Windows Defender Firewall to open its settings.Press Windows + R, type control panel, and press Enter to open Control Panel.Access Windows Defender from Control Panel

Click Windows Security in the left panel and click Open Windows Security button in the right window to open it.įor Windows 11, you can press Windows + I, click Privacy & Security on the left and click Windows Security on the right, and click Open Windows Security to open it. Open Windows Defender from Settingsįor Windows 10, press Windows + I to open Windows Settings. For Windows 11, you can click All Apps icon to list all apps in your system. To open Windows Defender in Windows 10/11, you can try the 5 ways below.Ĭlick Start, type Windows Defender in the search box and choose Windows Defender or Windows Security from the result to open it.įor Windows 10, click Start and find Windows Security or Windows Defender from the apps list. How to Open Windows Defender in Windows 10/11 – 5 Ways For Windows 11, you can click Start -> Settings -> Windows Update -> Check for updates. To download and install the latest Windows updates, you can click Start -> Settings -> Update & Security -> Windows Update -> Check for updates. If you can’t find Windows Defender on your computer, you can update Windows 11/10 to the latest version. Windows Defender is included in Windows 10/11 system and is not available for a standalone download now.

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