Drew wants to know if Microsoft Security Essentials is good enough or should he buy an AVS. Leo says that MSE is good if he doesn't want to pay for one, but if he's willing to buy it, then he should. Eset's Nod 32 has heuristics that enables it to anticipate viruses before they happen. But the antivirus software can give a false sense of security. If he relies on that and doesn't change his online behavior, he's going to get infected anyway. If he runs as a limited user, he can protect himself against 90% of all the bad stuff out there.