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.
Hewlett-Packard
We have been authorized resellers for HP servers, PCs, and printers for years. We offer sales, installation, and support for their business PCs (desktop and notebook), laser printers (black/white and color), scanners, and respective consumables.