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– On Windows XP, you can use Microsoft Security Essentials as Window Defender is no longer available. Cannot be used with Microsoft Security Essentials. – Comes built-in with Windows 8 and 10, but includes a virus scanner. Can be used with Microsoft Security Essentials. – Comes built-in with Windows Vista and Windows 7 and only protects against spyware. So here’s the current state of Windows Defender: It might have made more sense to just keep the name Microsoft Security Essentials in Windows 8/10, but they decided to stay with the Windows Defender name, which causes some of the confusion. It also uses the same virus definitions and the user interface is pretty much exactly the same. It pretty much is the same scanner as the one in Microsoft Security Essentials and that is the reason why Microsoft does not allow you to install Security Essentials on Windows 8/10. In Windows 8 and Windows 10, Windows Defender was upgraded to be able to do virus scans also. Again, it won’t catch viruses, just spyware. You can use Windows Defender Offline to scan for viruses before the operating system boots up, which can greatly help your chances of removing a very sneaky piece of malware or spyware. Windows Defender Offline is basically exactly what the name suggests: an offline version of Windows Defender that you download and run off a CD, DVD or USB drive. Once installed, it would disable Windows Defender altogether. Microsoft Security Essentials could be downloaded to replace Windows Defender since it could catch spyware and scan for viruses. That’s why you always needed another separate anti-virus program in Windows 7 and earlier. The main thing to note about Windows Defender is that it only protects against spyware in Windows 7 and below.
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You can still download Windows Defender Offline, which is different than Windows Defender and I’ll explain more below.
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You could also download Windows Defender for Windows XP and Windows Server 2003, though it seems that now you can’t anymore. Windows Defender was originally known as Microsoft AntiSpyware and was eventually included with Windows Vista and Windows 7. Thankfully, things are clearer in Windows 10. In this article, I’ll explain the differences between the different anti-virus tools in Windows 7 and Windows 8 and where you can use each tool.
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