Microsoft released the free PC Security software Microsoft Security Essentials yesterday. I am running on Symantec Norton right now and have no time to test MSE. Good thing Ars Technica found the time and published a first look at the Microsoft Security Essentials and they are actually impressed with it.
Their verdict: "Based on what we've seen so far, we have to recommend that you at least give the product a download. Everyone currently using free antimalware software should give it a shot, and those with paid solutions should think about taking MSE for a spin before renewing subscriptions."
For download of Microsoft Security Essentials visit the Microsoft site.