The best anti-malware prevention is the finger you use to left-click your mouse. The safest key on your keybpard is ESC and is much more powerful than hoping for an Undo feature.
WatchGuard
Seattle-based WatchGuard has deployed nearly a million of its integrated, multi-function threat management appliances worldwide to a diversity of businesses. We offer and deploy their products for our clients demanding the most stringent threat protection. Deployed in environments from headquarters to branch locations with and without e-commerce, this product line is consistently rated among the best solutions in the Internet threat protection landscape.