GIANT Company Software, Inc
| A component of Microsoft Windows | |
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Windows Defender Antivirus, as appears in the Windows 10 Creators Update
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| Details | |
| Type | Antivirus software on Windows 8 and later; formerly spyware removal software |
| Included with | Windows Vista and later, Windows Server 2016 |
| Also available for | Windows XP and Windows Server 2003 |
| Support status | |
| Same as the version of Windows with which it is integrated | |
| Related components | |
Windows Defender, officially called Windows Defender Antivirus in Windows 10 Creators Update, is an anti-malware component of Microsoft Windows. It was first released as a free antispyware program download for Windows XP, shipped with Windows Vista and Windows 7 and made into a full antivirus program replacing Microsoft Security Essentials as part of Windows 8 and later versions.
Before Windows 8, Windows Defender protected against spyware. It included a number of real-time security agents that monitored several common areas of Windows for changes which might have been caused by spyware. It also included the ability to easily remove installed ActiveX software. Windows Defender featured integrated support for Microsoft SpyNet that allows users to report to Microsoft what they consider to be spyware, and what applications and device drivers they allow to be installed on their system. Protection against viruses was added in Windows 8; Windows Defender in Windows 8 resembles Microsoft Security Essentials (MSE) and uses the same virus definitions.
In Windows 10, Windows Defender settings are controlled by the Settings app, and the Settings button opens the Settings app. In the Windows 10 Anniversary Update, toast notifications appear to announce the results of a scan, even if no viruses are found. The same update introduced a new flat logo.
Windows Defender is based on GIANT AntiSpyware, which was originally developed by GIANT Company Software, Inc. The company's acquisition was announced by Microsoft on December 16, 2004. While the original GIANT AntiSpyware supported older Windows versions, support for the Windows 9x line of operating systems was later dropped.
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