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Microsoft’s Security Essentials has been our favorite anti-malware application for a while—it’s free, unobtrusive, and it doesn’t slow your PC down, but now it’s even better with the new 2.0 release, which adds network filtering, heuristic protection, and more.

Just to be clear and direct with you: we absolutely recommend Microsoft Security Essentials as your anti-malware / anti-virus utility over any other option—and how can you argue? It’s totally free!

Über wrote:I'm using Avast! now to test it, but if it fucks up I'll def. be back on MSE...

Microsoft's option has always been adequate at finding new malware without definitions, but the addition of an heuristic engine bumps its power up quite a bit. It may be subject to a few more false positives, but you're much less likely to get hit with malware than ever before.