Formerly known as Windows Defender, Microsoft Defender is an antivirus protection program that's included with Windows 10.
Here are the basics: Microsoft Defender is the virus protection integrated into Windows by default. If no other antivirus program is installed and activated, Defender protects you against viruses. You ...
Defender will continue to provide security even for unsupported Windows 10 PCs. But Microsoft still wants you to move to Windows 11.
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