The Windows Defender is automatically turned off when you install a third-party antivirus program. However, when Windows Defender is the default antivirus, Windows 10 10 doesn’t allow you disable Windows Defender for obvious security reason. In short, Windows 10 doesn’t allow you easily remove or disable Windows Defender program. There is a setting under Windows Defender section of Settings app to turn off Windows Defender real-time protection but the catch is that Windows Defender is automatically enables itself after a short period if it finds that no other how to disable avast antivirus free is installed on your Windows 10 PC.
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