This is an old version of this software. You can also download v4.5.216.0 (latest stable version).
XMicrosoft Security Essentials for Windows XP/Vista/7 (64-bit) v1.0.2498.0
Freeware
Vista / Win7 / WinXP
Vista / Win7 / WinXP
Microsoft Security Essentials provides real-time protection for your home PC that guards against viruses, spyware, and other malicious software. It is a free tool from Microsoft that is simple to install, easy to use, and always kept up to date so you can be assured your PC is protected by the latest technology. It?s easy to tell if your PC is secure when you?re green, you?re good. Microsoft Security Essentials runs quietly and efficiently in the background so that you are free to use your Windows-based PC the way you want, without interruptions or long computer wait times.
Other editions:
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but for free virus protection is Microsoft Security Essentials # 2 Avast! Free Antivirus 5 is # 1
Installed finally by using IE...good so far, regular updates and caught one trojan a week ago which was easy to quarantine and remove...