I'm using Microsoft Security Essentials on my Build 7600. It installed without a hitch a few months ago. I'm wonder if it ever phones home to check validation. The computer has been fine for a few months now. This morning, I received notification of non-genuine windows. But I'm not sure how. I didn't install any of the new updates as far as I know. I ran Daz Loader again, restarted twice, and everything went away. Anyone else?