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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.
SmartScreen (officially called Windows SmartScreen, Windows Defender SmartScreen and SmartScreen Filter in different places) is a cloud-based anti-phishing and anti-malware component included in several Microsoft products: All versions of the Microsoft Windows operating system since Windows 8; Web browsers Internet Explorer and Microsoft Edge
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.
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.
VirusTotal's Windows Uploader [10] is a discontinued desktop application which integrates into File Explorer's context menu, under Send To > VirusTotal. The application also launches manually for submitting a URL or a program that is currently running in the OS. VirusTotal stores the name and various hashes for each scanned file.
Despite bad detection scores in its early days, AV-Test now certifies Defender as one of its top products. [73] [74] While it isn't publicly known how the inclusion of antivirus software in Windows affected antivirus sales, Google search traffic for antivirus has declined significantly since 2010. [75] In 2014 Microsoft bought McAfee. [76]
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