Microsoft Security Essentials

Microsoft Security Essentials is a free* download 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. Microsoft Security Essentials runs quietly and efficiently in the background so you’re free to use your Windows-based PC the way you want—without interruptions or long computer wait times. Microsoft Security Essentials is efficient and compact. Scans and updates are scheduled to run when the PC is idle and the software works in a way that your PC is still snappy when you’re using it. All this makes Microsoft Security Essentials friendly for all sorts of computers—your old PC, your new PC, your laptop, as well as your little netbook.

Before installing Microsoft Security Essentials, we recommend that you uninstall other antivirus software already running on your PC. Running more than one antivirus program at the same time can potentially cause conflicts that affect PC performance.

*Your PC must run genuine Windows to install Microsoft Security Essentials.

Download: Microsoft Security Essentials | ~ 12 MB (Freeware)
View: MSE Website | Image via Google

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Hmm, I think I'm gonna hold off on this one till Windows Update says so or MSE itself updates itself. Plus it wants me to uninstall the one I have first. Never had to before and I'm not really in to doing that.
Version number on site says...
File downloaded says...
My already installed MSE says...
In Control Panel/Programs says the version is...
So I don't know what's up, lol.

Windows update already had the update for the latest version for a while and also had the same version mismatch between the application and the installer. No need to install it again.

I was kinda thinin that must have happened when I went back to the Control Panel/Programs and seen that it was installed on the 13th of this month, so yeah, was a Windows Update. So I guess I'm good. Thanx.

That can't be right. Mine already says it is that version number.
NVM... the version number in the title is wrong, the new version available is

TCLN Ryster said,
That's because the "version" included in Windows 8 isn't the same product.

But it is the same engine.
Just what it does on Win7 as a 3rd party package... it does OOTB on Win8. No giant differences between MSE and WD.

Change log: Couple of Dev guys got drunk, invited some stippers over and they watched 'em bump the version number. Actual changes = nothing!

testman said,
Which is wrong - you could always update it by downloading the latest build through the official website.

No. This version was available only through windows update.
"This upgrade is 'only' available via the Windows Update process at this time. This means you will not find it (yet) at the Download Center nor at the MSE official download site, as not yet updated and still pointing to old version 4.1.522.0."