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2. Microsoft Defender Antivirus - Wikipedia

   en.wikipedia.org/wiki/Microsoft_Defender_Antivirus

   Microsoft Defender Antivirus (formerly Windows Defender) is an antivirus software component of Microsoft Windows. It was first released as a downloadable free anti-spyware program for Windows XP and was shipped with Windows Vista and Windows 7 .

3. Do you have to pay for Microsoft's Defender Antivirus? - AOL

   www.aol.com/pay-microsofts-defender-antivirus...

   If you've ever rocked with a Microsoft operating system at any point in your life, you're probably familiar with Microsoft Defender Antivirus. It's been with the OS since the early 90's when it ...

4. Microsoft Security Essentials - Wikipedia

   en.wikipedia.org/wiki/Microsoft_Security_Essentials

   Prior to version 4.5, MSE ran on Windows XP, Windows Vista, and Windows 7, but not on Windows 8 and later versions, which have built-in AV components known as Windows Defender. MSE 4.5 and later versions do not run on Windows XP. The license agreement allows home users and small businesses to install and use the product free of charge.

5. Malicious Software Removal Tool - Wikipedia

   en.wikipedia.org/wiki/Malicious_Software_Removal...

   Microsoft Windows Malicious Software Removal Tool (MSRT) is a freeware second-opinion malware scanner that Microsoft's Windows Update downloads and runs on Windows computers each month, independent of the installed antivirus software. First released on January 13, 2005, [2] MSRT does not offer real-time protection.

6. Security and safety features new to Windows Vista - Wikipedia

   en.wikipedia.org/wiki/Security_and_safety...

   Windows Vista includes Windows Defender, Microsoft's anti-spyware utility. According to Microsoft, it was renamed from 'Microsoft AntiSpyware' because it not only features scanning of the system for spyware, similar to other free products on the market, but also includes Real Time Security agents that monitor several common areas of Windows for ...

7. Comparison of antivirus software - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_antivirus...

   The term "on-demand scan" refers to the possibility of performing a manual scan (by the user) on the entire computer/device, while "on-access scan" refers to the ability of a product to automatically scan every file at its creation or subsequent modification.